79773161 has 8 divisors (see below), whose sum is σ = 85996680. Its totient is φ = 73562112.

The previous prime is 79773157. The next prime is 79773179. The reversal of 79773161 is 16137797.

It can be written as a sum of positive squares in 4 ways, for example, as 15452761 + 64320400 = 3931^2 + 8020^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79773161 - 2² = 79773157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79773151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13481 + ... + 18473.

It is an arithmetic number, because the mean of its divisors is an integer number (10749585).

Almost surely, 2^79773161 is an apocalyptic number.

It is an amenable number.

79773161 is a deficient number, since it is larger than the sum of its proper divisors (6223519).

79773161 is a wasteful number, since it uses less digits than its factorization.

79773161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235.

The product of its digits is 55566, while the sum is 41.

The square root of 79773161 is about 8931.5822226524. The cubic root of 79773161 is about 430.4792942982.

The spelling of 79773161 in words is "seventy-nine million, seven hundred seventy-three thousand, one hundred sixty-one".