79457039 has 2 divisors, whose sum is σ = 79457040. Its totient is φ = 79457038.

The previous prime is 79457029. The next prime is 79457041. The reversal of 79457039 is 93075497.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93075497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79457039 - 2¹² = 79452943 is a prime.

Together with 79457041, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4639589 and since 79457039 and 4639589 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79457029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39728519 + 39728520.

It is an arithmetic number, because the mean of its divisors is an integer number (39728520).

Almost surely, 2^79457039 is an apocalyptic number.

79457039 is a deficient number, since it is larger than the sum of its proper divisors (1).

79457039 is an equidigital number, since it uses as much as digits as its factorization.

79457039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 79457039 is about 8913.8677912565. The cubic root of 79457039 is about 429.9099126220.

The spelling of 79457039 in words is "seventy-nine million, four hundred fifty-seven thousand, thirty-nine".