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9997381 is a prime number
BaseRepresentation
bin100110001000…
…110001000101
3200210220211101
4212020301011
510024404011
6554140101
7150655612
oct46106105
920726741
109997381
1157091a9
123421631
1320c0614
141483509
15d272c1
hex988c45

9997381 has 2 divisors, whose sum is σ = 9997382. Its totient is φ = 9997380.

The previous prime is 9997367. The next prime is 9997397. The reversal of 9997381 is 1837999.

9997381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5336100 + 4661281 = 2310^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 9997381 - 25 = 9997349 is a prime.

It is a super-2 number, since 2×99973812 = 199895253718322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9997321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998690 + 4998691.

It is an arithmetic number, because the mean of its divisors is an integer number (4998691).

Almost surely, 29997381 is an apocalyptic number.

It is an amenable number.

9997381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997381 is an equidigital number, since it uses as much as digits as its factorization.

9997381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 9997381 is about 3161.8635327920. The cubic root of 9997381 is about 215.4246591461.

The spelling of 9997381 in words is "nine million, nine hundred ninety-seven thousand, three hundred eighty-one".