79439651 has 2 divisors, whose sum is σ = 79439652. Its totient is φ = 79439650.

The previous prime is 79439617. The next prime is 79439653. The reversal of 79439651 is 15693497.

It is a strong prime.

It is an emirp because it is prime and its reverse (15693497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79439651 - 2¹⁸ = 79177507 is a prime.

Together with 79439653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79439653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39719825 + 39719826.

It is an arithmetic number, because the mean of its divisors is an integer number (39719826).

Almost surely, 2^79439651 is an apocalyptic number.

79439651 is a deficient number, since it is larger than the sum of its proper divisors (1).

79439651 is an equidigital number, since it uses as much as digits as its factorization.

79439651 is an odious number, because the sum of its binary digits is odd.

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

The square root of 79439651 is about 8912.8924037037. The cubic root of 79439651 is about 429.8785505216.

The spelling of 79439651 in words is "seventy-nine million, four hundred thirty-nine thousand, six hundred fifty-one".