72550923 has 4 divisors (see below), whose sum is σ = 96734568. Its totient is φ = 48367280.

The previous prime is 72550913. The next prime is 72550927. The reversal of 72550923 is 32905527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72550923 - 2¹⁰ = 72549899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72550927) 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, 12091818 + ... + 12091823.

It is an arithmetic number, because the mean of its divisors is an integer number (24183642).

Almost surely, 2^72550923 is an apocalyptic number.

72550923 is a deficient number, since it is larger than the sum of its proper divisors (24183645).

72550923 is a wasteful number, since it uses less digits than its factorization.

72550923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24183644.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 72550923 is about 8517.6829595847. The cubic root of 72550923 is about 417.0751493475.

The spelling of 72550923 in words is "seventy-two million, five hundred fifty thousand, nine hundred twenty-three".