64591379 has 2 divisors, whose sum is σ = 64591380. Its totient is φ = 64591378.

The previous prime is 64591367. The next prime is 64591399. The reversal of 64591379 is 97319546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64591379 - 2⁴ = 64591363 is a prime.

It is a super-2 number, since 2×64591379² = 8344092482243282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64591399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32295689 + 32295690.

It is an arithmetic number, because the mean of its divisors is an integer number (32295690).

Almost surely, 2^64591379 is an apocalyptic number.

64591379 is a deficient number, since it is larger than the sum of its proper divisors (1).

64591379 is an equidigital number, since it uses as much as digits as its factorization.

64591379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 64591379 is about 8036.8761966326. The cubic root of 64591379 is about 401.2282641409.

The spelling of 64591379 in words is "sixty-four million, five hundred ninety-one thousand, three hundred seventy-nine".