79257819269 has 2 divisors, whose sum is σ = 79257819270. Its totient is φ = 79257819268.

The previous prime is 79257819253. The next prime is 79257819283. The reversal of 79257819269 is 96291875297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73905141025 + 5352678244 = 271855^2 + 73162^2 .

It is a cyclic number.

It is not a de Polignac number, because 79257819269 - 2⁴ = 79257819253 is a prime.

It is a super-2 number, since 2×79257819269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79257819239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39628909634 + 39628909635.

It is an arithmetic number, because the mean of its divisors is an integer number (39628909635).

Almost surely, 2^79257819269 is an apocalyptic number.

It is an amenable number.

79257819269 is a deficient number, since it is larger than the sum of its proper divisors (1).

79257819269 is an equidigital number, since it uses as much as digits as its factorization.

79257819269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 65.

The spelling of 79257819269 in words is "seventy-nine billion, two hundred fifty-seven million, eight hundred nineteen thousand, two hundred sixty-nine".