79406539 has 2 divisors, whose sum is σ = 79406540. Its totient is φ = 79406538.

The previous prime is 79406513. The next prime is 79406543. The reversal of 79406539 is 93560497.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79406539 - 2⁹ = 79406027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79406495 and 79406504.

It is not a weakly prime, because it can be changed into another prime (79406599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39703269 + 39703270.

It is an arithmetic number, because the mean of its divisors is an integer number (39703270).

Almost surely, 2^79406539 is an apocalyptic number.

79406539 is a deficient number, since it is larger than the sum of its proper divisors (1).

79406539 is an equidigital number, since it uses as much as digits as its factorization.

79406539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 79406539 is about 8911.0346761754. The cubic root of 79406539 is about 429.8188149591.

The spelling of 79406539 in words is "seventy-nine million, four hundred six thousand, five hundred thirty-nine".