64130279 has 4 divisors (see below), whose sum is σ = 66918576. Its totient is φ = 61341984.

The previous prime is 64130251. The next prime is 64130293. The reversal of 64130279 is 97203146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64130279 - 2²⁰ = 63081703 is a prime.

It is a super-2 number, since 2×64130279² = 8225385369235682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64130299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394114 + ... + 1394159.

It is an arithmetic number, because the mean of its divisors is an integer number (16729644).

Almost surely, 2^64130279 is an apocalyptic number.

64130279 is a deficient number, since it is larger than the sum of its proper divisors (2788297).

64130279 is a wasteful number, since it uses less digits than its factorization.

64130279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788296.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 64130279 is about 8008.1382980066. The cubic root of 64130279 is about 400.2712306266.

The spelling of 64130279 in words is "sixty-four million, one hundred thirty thousand, two hundred seventy-nine".