64939279 has 2 divisors, whose sum is σ = 64939280. Its totient is φ = 64939278.

The previous prime is 64939253. The next prime is 64939307. The reversal of 64939279 is 97293946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64939279 - 2⁵ = 64939247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64939229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32469639 + 32469640.

It is an arithmetic number, because the mean of its divisors is an integer number (32469640).

Almost surely, 2^64939279 is an apocalyptic number.

64939279 is a deficient number, since it is larger than the sum of its proper divisors (1).

64939279 is an equidigital number, since it uses as much as digits as its factorization.

64939279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 49.

The square root of 64939279 is about 8058.4911118646. The cubic root of 64939279 is about 401.9473355760.

The spelling of 64939279 in words is "sixty-four million, nine hundred thirty-nine thousand, two hundred seventy-nine".