72397753 has 4 divisors (see below), whose sum is σ = 72570960. Its totient is φ = 72224548.

The previous prime is 72397739. The next prime is 72397769. The reversal of 72397753 is 35779327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72397753 - 2¹³ = 72389561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72397153) 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 3 ways as a sum of consecutive naturals, for example, 85975 + ... + 86812.

It is an arithmetic number, because the mean of its divisors is an integer number (18142740).

Almost surely, 2^72397753 is an apocalyptic number.

It is an amenable number.

72397753 is a deficient number, since it is larger than the sum of its proper divisors (173207).

72397753 is a wasteful number, since it uses less digits than its factorization.

72397753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173206.

The product of its digits is 277830, while the sum is 43.

The square root of 72397753 is about 8508.6869139721. The cubic root of 72397753 is about 416.7814319243.

The spelling of 72397753 in words is "seventy-two million, three hundred ninety-seven thousand, seven hundred fifty-three".