72369873 has 6 divisors (see below), whose sum is σ = 104534274. Its totient is φ = 48246576.

The previous prime is 72369863. The next prime is 72369887. The reversal of 72369873 is 37896327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 60652944 + 11716929 = 7788^2 + 3423^2 .

It is not a de Polignac number, because 72369873 - 2²⁴ = 55592657 is a prime.

It is a super-2 number, since 2×72369873² = 10474797036072258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72369853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4020540 + ... + 4020557.

It is an arithmetic number, because the mean of its divisors is an integer number (17422379).

Almost surely, 2^72369873 is an apocalyptic number.

It is an amenable number.

72369873 is a deficient number, since it is larger than the sum of its proper divisors (32164401).

72369873 is a wasteful number, since it uses less digits than its factorization.

72369873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041103 (or 8041100 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 72369873 is about 8507.0484305663. The cubic root of 72369873 is about 416.7279249312.

The spelling of 72369873 in words is "seventy-two million, three hundred sixty-nine thousand, eight hundred seventy-three".