72832161 has 4 divisors (see below), whose sum is σ = 97109552. Its totient is φ = 48554772.

The previous prime is 72832147. The next prime is 72832163. The reversal of 72832161 is 16123827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16123827 = 3 ⋅5374609.

It is not a de Polignac number, because 72832161 - 2⁵ = 72832129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72832163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12138691 + ... + 12138696.

It is an arithmetic number, because the mean of its divisors is an integer number (24277388).

Almost surely, 2^72832161 is an apocalyptic number.

It is an amenable number.

72832161 is a deficient number, since it is larger than the sum of its proper divisors (24277391).

72832161 is a wasteful number, since it uses less digits than its factorization.

72832161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24277390.

The product of its digits is 4032, while the sum is 30.

The square root of 72832161 is about 8534.1760586480. The cubic root of 72832161 is about 417.6133742561.

Adding to 72832161 its reverse (16123827), we get a palindrome (88955988).

The spelling of 72832161 in words is "seventy-two million, eight hundred thirty-two thousand, one hundred sixty-one".