72331437 has 4 divisors (see below), whose sum is σ = 96441920. Its totient is φ = 48220956.

The previous prime is 72331409. The next prime is 72331459. The reversal of 72331437 is 73413327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72331437 - 2¹⁰ = 72330413 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 (72331477) 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, 12055237 + ... + 12055242.

It is an arithmetic number, because the mean of its divisors is an integer number (24110480).

Almost surely, 2^72331437 is an apocalyptic number.

It is an amenable number.

72331437 is a deficient number, since it is larger than the sum of its proper divisors (24110483).

72331437 is a wasteful number, since it uses less digits than its factorization.

72331437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24110482.

The product of its digits is 10584, while the sum is 30.

The square root of 72331437 is about 8504.7890626399. The cubic root of 72331437 is about 416.6541364410.

The spelling of 72331437 in words is "seventy-two million, three hundred thirty-one thousand, four hundred thirty-seven".