72076631 has 4 divisors (see below), whose sum is σ = 78629064. Its totient is φ = 65524200.

The previous prime is 72076621. The next prime is 72076639. The reversal of 72076631 is 13667027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13667027 = 11 ⋅1242457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72076631 is a prime.

It is a super-2 number, since 2×72076631² = 10390081472620322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72076639) 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, 3276200 + ... + 3276221.

It is an arithmetic number, because the mean of its divisors is an integer number (19657266).

Almost surely, 2^72076631 is an apocalyptic number.

72076631 is a deficient number, since it is larger than the sum of its proper divisors (6552433).

72076631 is a wasteful number, since it uses less digits than its factorization.

72076631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6552432.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 72076631 is about 8489.7956983664. The cubic root of 72076631 is about 416.1643038571.

The spelling of 72076631 in words is "seventy-two million, seventy-six thousand, six hundred thirty-one".