79959769 has 2 divisors, whose sum is σ = 79959770. Its totient is φ = 79959768.

The previous prime is 79959751. The next prime is 79959787. The reversal of 79959769 is 96795997.

It is a balanced prime because it is at equal distance from previous prime (79959751) and next prime (79959787).

It can be written as a sum of positive squares in only one way, i.e., 64593369 + 15366400 = 8037^2 + 3920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79959769 is a prime.

It is a super-2 number, since 2×79959769² = 12787129317066722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79959749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39979884 + 39979885.

It is an arithmetic number, because the mean of its divisors is an integer number (39979885).

Almost surely, 2^79959769 is an apocalyptic number.

It is an amenable number.

79959769 is a deficient number, since it is larger than the sum of its proper divisors (1).

79959769 is an equidigital number, since it uses as much as digits as its factorization.

79959769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 61.

The square root of 79959769 is about 8942.0226459118. The cubic root of 79959769 is about 430.8146966769.

The spelling of 79959769 in words is "seventy-nine million, nine hundred fifty-nine thousand, seven hundred sixty-nine".