72370457 has 4 divisors (see below), whose sum is σ = 74866020. Its totient is φ = 69874896.

The previous prime is 72370447. The next prime is 72370477. The reversal of 72370457 is 75407327.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39891856 + 32478601 = 6316^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 72370457 - 2¹⁸ = 72108313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72370447) 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, 1247738 + ... + 1247795.

It is an arithmetic number, because the mean of its divisors is an integer number (18716505).

Almost surely, 2^72370457 is an apocalyptic number.

It is an amenable number.

72370457 is a deficient number, since it is larger than the sum of its proper divisors (2495563).

72370457 is a wasteful number, since it uses less digits than its factorization.

72370457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495562.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 72370457 is about 8507.0827549754. The cubic root of 72370457 is about 416.7290458785.

It can be divided in two parts, 72370 and 457, that added together give a palindrome (72827).

The spelling of 72370457 in words is "seventy-two million, three hundred seventy thousand, four hundred fifty-seven".