15655489 has 2 divisors, whose sum is σ = 15655490. Its totient is φ = 15655488.

The previous prime is 15655469. The next prime is 15655499. The reversal of 15655489 is 98455651.

15655489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 4765489 = 3300^2 + 2183^2 .

It is a cyclic number.

It is not a de Polignac number, because 15655489 - 2⁵ = 15655457 is a prime.

It is not a weakly prime, because it can be changed into another prime (15655439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7827744 + 7827745.

It is an arithmetic number, because the mean of its divisors is an integer number (7827745).

Almost surely, 2^15655489 is an apocalyptic number.

It is an amenable number.

15655489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15655489 is an equidigital number, since it uses as much as digits as its factorization.

15655489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 43.

The square root of 15655489 is about 3956.7017830511. The cubic root of 15655489 is about 250.1625023491.

The spelling of 15655489 in words is "fifteen million, six hundred fifty-five thousand, four hundred eighty-nine".