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9973021 is a prime number
BaseRepresentation
bin100110000010…
…110100011101
3200202200102011
4212002310131
510023114041
6553431221
7150524602
oct46026435
920680364
109973021
1156a1973
12340b511
1320b24c6
1414786a9
15d1ee81
hex982d1d

9973021 has 2 divisors, whose sum is σ = 9973022. Its totient is φ = 9973020.

The previous prime is 9973009. The next prime is 9973027. The reversal of 9973021 is 1203799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 1240996 = 2955^2 + 1114^2 .

It is an emirp because it is prime and its reverse (1203799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9973021 - 29 = 9972509 is a prime.

It is a super-2 number, since 2×99730212 = 198922295732882, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is equal to p662935 and since 9973021 and 662935 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9973027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986510 + 4986511.

It is an arithmetic number, because the mean of its divisors is an integer number (4986511).

Almost surely, 29973021 is an apocalyptic number.

It is an amenable number.

9973021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973021 is an equidigital number, since it uses as much as digits as its factorization.

9973021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 9973021 is about 3158.0090246863. The cubic root of 9973021 is about 215.2495461920.

The spelling of 9973021 in words is "nine million, nine hundred seventy-three thousand, twenty-one".