64390537 has 2 divisors, whose sum is σ = 64390538. Its totient is φ = 64390536.

The previous prime is 64390531. The next prime is 64390549. The reversal of 64390537 is 73509346.

64390537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60466176 + 3924361 = 7776^2 + 1981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64390537 is a prime.

It is a super-2 number, since 2×64390537² = 8292282510296738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64390496 and 64390505.

It is not a weakly prime, because it can be changed into another prime (64390531) 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, 32195268 + 32195269.

It is an arithmetic number, because the mean of its divisors is an integer number (32195269).

Almost surely, 2^64390537 is an apocalyptic number.

It is an amenable number.

64390537 is a deficient number, since it is larger than the sum of its proper divisors (1).

64390537 is an equidigital number, since it uses as much as digits as its factorization.

64390537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 64390537 is about 8024.3714395584. The cubic root of 64390537 is about 400.8119693990.

The spelling of 64390537 in words is "sixty-four million, three hundred ninety thousand, five hundred thirty-seven".