79135439 has 2 divisors, whose sum is σ = 79135440. Its totient is φ = 79135438.

The previous prime is 79135429. The next prime is 79135487. The reversal of 79135439 is 93453197.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79135439 - 2⁴ = 79135423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79135396 and 79135405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79135409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39567719 + 39567720.

It is an arithmetic number, because the mean of its divisors is an integer number (39567720).

Almost surely, 2^79135439 is an apocalyptic number.

79135439 is a deficient number, since it is larger than the sum of its proper divisors (1).

79135439 is an equidigital number, since it uses as much as digits as its factorization.

79135439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 41.

The square root of 79135439 is about 8895.8101935687. The cubic root of 79135439 is about 429.3291124676.

The spelling of 79135439 in words is "seventy-nine million, one hundred thirty-five thousand, four hundred thirty-nine".