37990091 has 4 divisors (see below), whose sum is σ = 38189184. Its totient is φ = 37791000.

The previous prime is 37990079. The next prime is 37990093. The reversal of 37990091 is 19009973.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 37990091 - 2¹⁴ = 37973707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37990093) 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, 99260 + ... + 99641.

It is an arithmetic number, because the mean of its divisors is an integer number (9547296).

Almost surely, 2^37990091 is an apocalyptic number.

37990091 is a deficient number, since it is larger than the sum of its proper divisors (199093).

37990091 is a wasteful number, since it uses less digits than its factorization.

37990091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199092.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 37990091 is about 6163.6102245356. The cubic root of 37990091 is about 336.1683154953.

The spelling of 37990091 in words is "thirty-seven million, nine hundred ninety thousand, ninety-one".