72237037 has 4 divisors (see below), whose sum is σ = 74567296. Its totient is φ = 69906780.

The previous prime is 72237013. The next prime is 72237079. The reversal of 72237037 is 73073227.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73073227 = 233 ⋅313619.

It is a cyclic number.

It is not a de Polignac number, because 72237037 - 2¹⁵ = 72204269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2330227 = 72237037 / (7 + 2 + 2 + 3 + 7 + 0 + 3 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72237007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165083 + ... + 1165144.

It is an arithmetic number, because the mean of its divisors is an integer number (18641824).

Almost surely, 2^72237037 is an apocalyptic number.

It is an amenable number.

72237037 is a deficient number, since it is larger than the sum of its proper divisors (2330259).

72237037 is a wasteful number, since it uses less digits than its factorization.

72237037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330258.

The product of its (nonzero) digits is 12348, while the sum is 31.

The square root of 72237037 is about 8499.2374363822. The cubic root of 72237037 is about 416.4727986282.

The spelling of 72237037 in words is "seventy-two million, two hundred thirty-seven thousand, thirty-seven".