15697369 has 2 divisors, whose sum is σ = 15697370. Its totient is φ = 15697368.

The previous prime is 15697349. The next prime is 15697373. The reversal of 15697369 is 96379651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14288400 + 1408969 = 3780^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 15697369 - 2¹⁷ = 15566297 is a prime.

It is a super-2 number, since 2×15697369² = 492814787044322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15697349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7848684 + 7848685.

It is an arithmetic number, because the mean of its divisors is an integer number (7848685).

Almost surely, 2^15697369 is an apocalyptic number.

It is an amenable number.

15697369 is a deficient number, since it is larger than the sum of its proper divisors (1).

15697369 is an equidigital number, since it uses as much as digits as its factorization.

15697369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 15697369 is about 3961.9905350720. The cubic root of 15697369 is about 250.3853736434.

The spelling of 15697369 in words is "fifteen million, six hundred ninety-seven thousand, three hundred sixty-nine".