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9699319921 is a prime number
BaseRepresentation
bin10010000100001111…
…11110000001110001
3221000221222111121011
421002013332001301
5124331011214141
64242242030521
7462233600434
oct110207760161
927027874534
109699319921
114128016685
121a68348441
13bb7611c75
1468025381b
153bb7b7881
hex2421fe071

9699319921 has 2 divisors, whose sum is σ = 9699319922. Its totient is φ = 9699319920.

The previous prime is 9699319919. The next prime is 9699319979. The reversal of 9699319921 is 1299139969.

9699319921 = 696392 + 696402.

It is an a-pointer prime, because the next prime (9699319979) can be obtained adding 9699319921 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4849729600 + 4849590321 = 69640^2 + 69639^2 .

It is a cyclic number.

It is not a de Polignac number, because 9699319921 - 21 = 9699319919 is a prime.

Together with 9699319919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9699349921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4849659960 + 4849659961.

It is an arithmetic number, because the mean of its divisors is an integer number (4849659961).

Almost surely, 29699319921 is an apocalyptic number.

9699319921 is the 69640-th centered square number.

It is an amenable number.

9699319921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9699319921 is an equidigital number, since it uses as much as digits as its factorization.

9699319921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2125764, while the sum is 58.

The square root of 9699319921 is about 98485.1253794196. The cubic root of 9699319921 is about 2132.6213929348.

The spelling of 9699319921 in words is "nine billion, six hundred ninety-nine million, three hundred nineteen thousand, nine hundred twenty-one".