865413079 has 2 divisors, whose sum is σ = 865413080. Its totient is φ = 865413078.

The previous prime is 865413053. The next prime is 865413149. The reversal of 865413079 is 970314568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 865413079 - 2¹⁵ = 865380311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865413049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432706539 + 432706540.

It is an arithmetic number, because the mean of its divisors is an integer number (432706540).

Almost surely, 2^865413079 is an apocalyptic number.

865413079 is a deficient number, since it is larger than the sum of its proper divisors (1).

865413079 is an equidigital number, since it uses as much as digits as its factorization.

865413079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 865413079 is about 29417.9040551838. The cubic root of 865413079 is about 952.9595898196.

The spelling of 865413079 in words is "eight hundred sixty-five million, four hundred thirteen thousand, seventy-nine".