64237457 has 2 divisors, whose sum is σ = 64237458. Its totient is φ = 64237456.

The previous prime is 64237451. The next prime is 64237471. The reversal of 64237457 is 75473246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33223696 + 31013761 = 5764^2 + 5569^2 .

It is a cyclic number.

It is not a de Polignac number, because 64237457 - 2¹⁸ = 63975313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64237457.

It is not a weakly prime, because it can be changed into another prime (64237451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32118728 + 32118729.

It is an arithmetic number, because the mean of its divisors is an integer number (32118729).

Almost surely, 2^64237457 is an apocalyptic number.

It is an amenable number.

64237457 is a deficient number, since it is larger than the sum of its proper divisors (1).

64237457 is an equidigital number, since it uses as much as digits as its factorization.

64237457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 38.

The square root of 64237457 is about 8014.8273219078. The cubic root of 64237457 is about 400.4940915160.

The spelling of 64237457 in words is "sixty-four million, two hundred thirty-seven thousand, four hundred fifty-seven".