15932989 has 2 divisors, whose sum is σ = 15932990. Its totient is φ = 15932988.

The previous prime is 15932971. The next prime is 15932999. The reversal of 15932989 is 98923951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 2427364 = 3675^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 15932989 - 2¹⁵ = 15900221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15932999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7966494 + 7966495.

It is an arithmetic number, because the mean of its divisors is an integer number (7966495).

Almost surely, 2^15932989 is an apocalyptic number.

It is an amenable number.

15932989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15932989 is an equidigital number, since it uses as much as digits as its factorization.

15932989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 46.

The square root of 15932989 is about 3991.6148361284. The cubic root of 15932989 is about 251.6319320121.

The spelling of 15932989 in words is "fifteen million, nine hundred thirty-two thousand, nine hundred eighty-nine".