72391583 has 8 divisors (see below), whose sum is σ = 79038336. Its totient is φ = 65755800.

The previous prime is 72391549. The next prime is 72391589. The reversal of 72391583 is 38519327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72391583 - 2⁶ = 72391519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72391589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17768 + ... + 21458.

It is an arithmetic number, because the mean of its divisors is an integer number (9879792).

Almost surely, 2^72391583 is an apocalyptic number.

72391583 is a deficient number, since it is larger than the sum of its proper divisors (6646753).

72391583 is a wasteful number, since it uses less digits than its factorization.

72391583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485.

The product of its digits is 45360, while the sum is 38.

The square root of 72391583 is about 8508.3243356139. The cubic root of 72391583 is about 416.7695917111.

The spelling of 72391583 in words is "seventy-two million, three hundred ninety-one thousand, five hundred eighty-three".