64287997 has 2 divisors, whose sum is σ = 64287998. Its totient is φ = 64287996.

The previous prime is 64287991. The next prime is 64288031. The reversal of 64287997 is 79978246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62821476 + 1466521 = 7926^2 + 1211^2 .

It is a cyclic number.

It is not a de Polignac number, because 64287997 - 2¹⁵ = 64255229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64287991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32143998 + 32143999.

It is an arithmetic number, because the mean of its divisors is an integer number (32143999).

Almost surely, 2^64287997 is an apocalyptic number.

It is an amenable number.

64287997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64287997 is an equidigital number, since it uses as much as digits as its factorization.

64287997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 64287997 is about 8017.9796083552. The cubic root of 64287997 is about 400.5990960120.

The spelling of 64287997 in words is "sixty-four million, two hundred eighty-seven thousand, nine hundred ninety-seven".