79811073 has 12 divisors (see below), whose sum is σ = 122064228. Its totient is φ = 50077440.

The previous prime is 79811071. The next prime is 79811087. The reversal of 79811073 is 37011897.

It can be written as a sum of positive squares in 2 ways, for example, as 23155344 + 56655729 = 4812^2 + 7527^2 .

It is not a de Polignac number, because 79811073 - 2¹ = 79811071 is a prime.

It is a super-2 number, since 2×79811073² = 12739614746822658, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79811071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260668 + ... + 260973.

It is an arithmetic number, because the mean of its divisors is an integer number (10172019).

Almost surely, 2^79811073 is an apocalyptic number.

It is an amenable number.

79811073 is a deficient number, since it is larger than the sum of its proper divisors (42253155).

79811073 is a wasteful number, since it uses less digits than its factorization.

79811073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521664 (or 521661 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 79811073 is about 8933.7043268736. The cubic root of 79811073 is about 430.5474782424.

The spelling of 79811073 in words is "seventy-nine million, eight hundred eleven thousand, seventy-three".