79069503209 has 2 divisors, whose sum is σ = 79069503210. Its totient is φ = 79069503208.

The previous prime is 79069503179. The next prime is 79069503223. The reversal of 79069503209 is 90230596097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78920541184 + 148962025 = 280928^2 + 12205^2 .

It is an emirp because it is prime and its reverse (90230596097) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79069503209 is a prime.

It is a super-2 number, since 2×79069503209² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79069505209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39534751604 + 39534751605.

It is an arithmetic number, because the mean of its divisors is an integer number (39534751605).

Almost surely, 2^79069503209 is an apocalyptic number.

It is an amenable number.

79069503209 is a deficient number, since it is larger than the sum of its proper divisors (1).

79069503209 is an equidigital number, since it uses as much as digits as its factorization.

79069503209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 79069503209 in words is "seventy-nine billion, sixty-nine million, five hundred three thousand, two hundred nine".