72451923 has 8 divisors (see below), whose sum is σ = 96642000. Its totient is φ = 48281568.

The previous prime is 72451877. The next prime is 72451933. The reversal of 72451923 is 32915427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72451923 - 2⁸ = 72451667 is a prime.

It is a super-2 number, since 2×72451923² = 10498562292795858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72451933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10993 + ... + 16301.

It is an arithmetic number, because the mean of its divisors is an integer number (12080250).

Almost surely, 2^72451923 is an apocalyptic number.

72451923 is a deficient number, since it is larger than the sum of its proper divisors (24190077).

72451923 is a wasteful number, since it uses less digits than its factorization.

72451923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861.

The product of its digits is 15120, while the sum is 33.

The square root of 72451923 is about 8511.8695361242. The cubic root of 72451923 is about 416.8853551385.

The spelling of 72451923 in words is "seventy-two million, four hundred fifty-one thousand, nine hundred twenty-three".