72695231 has 4 divisors (see below), whose sum is σ = 83080272. Its totient is φ = 62310192.

The previous prime is 72695209. The next prime is 72695291. The reversal of 72695231 is 13259627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13259627 = 139 ⋅95393.

It is a de Polignac number, because none of the positive numbers 2^k-72695231 is a prime.

It is a super-2 number, since 2×72695231² = 10569193220286722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72695191 and 72695200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72695291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5192510 + ... + 5192523.

It is an arithmetic number, because the mean of its divisors is an integer number (20770068).

Almost surely, 2^72695231 is an apocalyptic number.

72695231 is a deficient number, since it is larger than the sum of its proper divisors (10385041).

72695231 is a wasteful number, since it uses less digits than its factorization.

72695231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385040.

The product of its digits is 22680, while the sum is 35.

The square root of 72695231 is about 8526.1498344798. The cubic root of 72695231 is about 417.3514951051.

The spelling of 72695231 in words is "seventy-two million, six hundred ninety-five thousand, two hundred thirty-one".