72393951 has 16 divisors (see below), whose sum is σ = 111124224. Its totient is φ = 41064384.

The previous prime is 72393929. The next prime is 72393961. The reversal of 72393951 is 15939327.

It is not a de Polignac number, because 72393951 - 2¹⁰ = 72392927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72393911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9705 + ... + 15458.

It is an arithmetic number, because the mean of its divisors is an integer number (6945264).

Almost surely, 2^72393951 is an apocalyptic number.

72393951 is a deficient number, since it is larger than the sum of its proper divisors (38730273).

72393951 is a wasteful number, since it uses less digits than its factorization.

72393951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25310.

The product of its digits is 51030, while the sum is 39.

The square root of 72393951 is about 8508.4634923116. The cubic root of 72393951 is about 416.7741359762.

The spelling of 72393951 in words is "seventy-two million, three hundred ninety-three thousand, nine hundred fifty-one".