37972723 has 4 divisors (see below), whose sum is σ = 37992808. Its totient is φ = 37952640.

The previous prime is 37972721. The next prime is 37972733. The reversal of 37972723 is 32727973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32727973 = 857 ⋅38189.

It is a cyclic number.

It is not a de Polignac number, because 37972723 - 2¹ = 37972721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37972721) 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, 6873 + ... + 11098.

It is an arithmetic number, because the mean of its divisors is an integer number (9498202).

Almost surely, 2^37972723 is an apocalyptic number.

37972723 is a deficient number, since it is larger than the sum of its proper divisors (20085).

37972723 is a wasteful number, since it uses less digits than its factorization.

37972723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20084.

The product of its digits is 111132, while the sum is 40.

The square root of 37972723 is about 6162.2011489402. The cubic root of 37972723 is about 336.1170787902.

The spelling of 37972723 in words is "thirty-seven million, nine hundred seventy-two thousand, seven hundred twenty-three".