15959897 has 2 divisors, whose sum is σ = 15959898. Its totient is φ = 15959896.

The previous prime is 15959893. The next prime is 15959899. The reversal of 15959897 is 79895951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15808576 + 151321 = 3976^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 15959897 - 2² = 15959893 is a prime.

Together with 15959899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15959893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7979948 + 7979949.

It is an arithmetic number, because the mean of its divisors is an integer number (7979949).

Almost surely, 2^15959897 is an apocalyptic number.

It is an amenable number.

15959897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15959897 is an equidigital number, since it uses as much as digits as its factorization.

15959897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 53.

The square root of 15959897 is about 3994.9839799428. The cubic root of 15959897 is about 251.7735062845.

The spelling of 15959897 in words is "fifteen million, nine hundred fifty-nine thousand, eight hundred ninety-seven".