16312489 has 2 divisors, whose sum is σ = 16312490. Its totient is φ = 16312488.

The previous prime is 16312459. The next prime is 16312511. The reversal of 16312489 is 98421361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13816089 + 2496400 = 3717^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 16312489 - 2¹³ = 16304297 is a prime.

It is not a weakly prime, because it can be changed into another prime (16312459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8156244 + 8156245.

It is an arithmetic number, because the mean of its divisors is an integer number (8156245).

Almost surely, 2^16312489 is an apocalyptic number.

It is an amenable number.

16312489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16312489 is an equidigital number, since it uses as much as digits as its factorization.

16312489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 16312489 is about 4038.8722435848. The cubic root of 16312489 is about 253.6141090927.

The spelling of 16312489 in words is "sixteen million, three hundred twelve thousand, four hundred eighty-nine".