72570023 has 4 divisors (see below), whose sum is σ = 73592208. Its totient is φ = 71547840.

The previous prime is 72570011. The next prime is 72570067. The reversal of 72570023 is 32007527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32007527 = 179 ⋅178813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72570023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72569974 and 72570001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72570073) 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, 510986 + ... + 511127.

It is an arithmetic number, because the mean of its divisors is an integer number (18398052).

Almost surely, 2^72570023 is an apocalyptic number.

72570023 is a deficient number, since it is larger than the sum of its proper divisors (1022185).

72570023 is a wasteful number, since it uses less digits than its factorization.

72570023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022184.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 72570023 is about 8518.8040827337. The cubic root of 72570023 is about 417.1117463383. Note that the first 3 decimals are identical.

The spelling of 72570023 in words is "seventy-two million, five hundred seventy thousand, twenty-three".