64362491 has 2 divisors, whose sum is σ = 64362492. Its totient is φ = 64362490.

The previous prime is 64362469. The next prime is 64362521. The reversal of 64362491 is 19426346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64362491 - 2¹⁸ = 64100347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (64362091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32181245 + 32181246.

It is an arithmetic number, because the mean of its divisors is an integer number (32181246).

Almost surely, 2^64362491 is an apocalyptic number.

64362491 is a deficient number, since it is larger than the sum of its proper divisors (1).

64362491 is an equidigital number, since it uses as much as digits as its factorization.

64362491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 64362491 is about 8022.6236980180. The cubic root of 64362491 is about 400.7537682746.

The spelling of 64362491 in words is "sixty-four million, three hundred sixty-two thousand, four hundred ninety-one".