72372811 has 4 divisors (see below), whose sum is σ = 82711792. Its totient is φ = 62033832.

The previous prime is 72372803. The next prime is 72372841. The reversal of 72372811 is 11827327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11827327 = 79 ⋅149713.

It is not a de Polignac number, because 72372811 - 2³ = 72372803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72372841) 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, 5169480 + ... + 5169493.

It is an arithmetic number, because the mean of its divisors is an integer number (20677948).

Almost surely, 2^72372811 is an apocalyptic number.

72372811 is a deficient number, since it is larger than the sum of its proper divisors (10338981).

72372811 is a wasteful number, since it uses less digits than its factorization.

72372811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338980.

The product of its digits is 4704, while the sum is 31.

The square root of 72372811 is about 8507.2211091519. The cubic root of 72372811 is about 416.7335641565.

The spelling of 72372811 in words is "seventy-two million, three hundred seventy-two thousand, eight hundred eleven".