37994913 has 20 divisors (see below), whose sum is σ = 61919088. Its totient is φ = 23026680.

The previous prime is 37994909. The next prime is 37994917. The reversal of 37994913 is 31949973.

It is an interprime number because it is at equal distance from previous prime (37994909) and next prime (37994917).

It is not a de Polignac number, because 37994913 - 2² = 37994909 is a prime.

It is a super-2 number, since 2×37994913² = 2887226827755138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (37994917) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20431 + ... + 22212.

Almost surely, 2^37994913 is an apocalyptic number.

37994913 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

37994913 is a deficient number, since it is larger than the sum of its proper divisors (23924175).

37994913 is a wasteful number, since it uses less digits than its factorization.

37994913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42666 (or 42657 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 37994913 is about 6164.0013789745. The cubic root of 37994913 is about 336.1825379324.

The spelling of 37994913 in words is "thirty-seven million, nine hundred ninety-four thousand, nine hundred thirteen".