72080169 has 16 divisors (see below), whose sum is σ = 112392192. Its totient is φ = 40230288.

The previous prime is 72080161. The next prime is 72080171. The reversal of 72080169 is 96108027.

It is not a de Polignac number, because 72080169 - 2³ = 72080161 is a prime.

It is a super-2 number, since 2×72080169² = 10391101526137122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72080161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39009 + ... + 40814.

It is an arithmetic number, because the mean of its divisors is an integer number (7024512).

Almost surely, 2^72080169 is an apocalyptic number.

It is an amenable number.

72080169 is a deficient number, since it is larger than the sum of its proper divisors (40312023).

72080169 is a wasteful number, since it uses less digits than its factorization.

72080169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79876.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 72080169 is about 8490.0040636033. The cubic root of 72080169 is about 416.1711131155.

The spelling of 72080169 in words is "seventy-two million, eighty thousand, one hundred sixty-nine".