16315589 has 2 divisors, whose sum is σ = 16315590. Its totient is φ = 16315588.

The previous prime is 16315567. The next prime is 16315601. The reversal of 16315589 is 98551361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 195364 = 4015^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 16315589 - 2⁸ = 16315333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16315289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8157794 + 8157795.

It is an arithmetic number, because the mean of its divisors is an integer number (8157795).

Almost surely, 2^16315589 is an apocalyptic number.

It is an amenable number.

16315589 is a deficient number, since it is larger than the sum of its proper divisors (1).

16315589 is an equidigital number, since it uses as much as digits as its factorization.

16315589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 16315589 is about 4039.2559958487. The cubic root of 16315589 is about 253.6301735519.

The spelling of 16315589 in words is "sixteen million, three hundred fifteen thousand, five hundred eighty-nine".