16864537 has 2 divisors, whose sum is σ = 16864538. Its totient is φ = 16864536.

The previous prime is 16864513. The next prime is 16864553. The reversal of 16864537 is 73546861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13868176 + 2996361 = 3724^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 16864537 - 2⁷ = 16864409 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16864537.

It is not a weakly prime, because it can be changed into another prime (16864577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432268 + 8432269.

It is an arithmetic number, because the mean of its divisors is an integer number (8432269).

Almost surely, 2^16864537 is an apocalyptic number.

It is an amenable number.

16864537 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864537 is an equidigital number, since it uses as much as digits as its factorization.

16864537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 16864537 is about 4106.6454680189. The cubic root of 16864537 is about 256.4433692538.

The spelling of 16864537 in words is "sixteen million, eight hundred sixty-four thousand, five hundred thirty-seven".