439879679 has 2 divisors, whose sum is σ = 439879680. Its totient is φ = 439879678.

The previous prime is 439879651. The next prime is 439879681. The reversal of 439879679 is 976978934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439879679 is a prime.

Together with 439879681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439879639) 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, 219939839 + 219939840.

It is an arithmetic number, because the mean of its divisors is an integer number (219939840).

Almost surely, 2^439879679 is an apocalyptic number.

439879679 is a deficient number, since it is larger than the sum of its proper divisors (1).

439879679 is an equidigital number, since it uses as much as digits as its factorization.

439879679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The square root of 439879679 is about 20973.3087280000. The cubic root of 439879679 is about 760.5211562798.

The spelling of 439879679 in words is "four hundred thirty-nine million, eight hundred seventy-nine thousand, six hundred seventy-nine".