72257983 has 4 divisors (see below), whose sum is σ = 82580560. Its totient is φ = 61935408.

The previous prime is 72257981. The next prime is 72257989. The reversal of 72257983 is 38975227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38975227 = 769 ⋅50683.

It is a cyclic number.

It is not a de Polignac number, because 72257983 - 2¹ = 72257981 is a prime.

It is a super-2 number, since 2×72257983² = 10442432214456578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72257981) 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, 5161278 + ... + 5161291.

It is an arithmetic number, because the mean of its divisors is an integer number (20645140).

Almost surely, 2^72257983 is an apocalyptic number.

72257983 is a deficient number, since it is larger than the sum of its proper divisors (10322577).

72257983 is a wasteful number, since it uses less digits than its factorization.

72257983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10322576.

The product of its digits is 211680, while the sum is 43.

The square root of 72257983 is about 8500.4695752647. The cubic root of 72257983 is about 416.5130485082.

The spelling of 72257983 in words is "seventy-two million, two hundred fifty-seven thousand, nine hundred eighty-three".