37999989 has 16 divisors (see below), whose sum is σ = 57671040. Its totient is φ = 24714720.

The previous prime is 37999987. The next prime is 37999991. The reversal of 37999989 is 98999973.

It is an interprime number because it is at equal distance from previous prime (37999987) and next prime (37999991).

It is not a de Polignac number, because 37999989 - 2¹ = 37999987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37999987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16057 + ... + 18270.

It is an arithmetic number, because the mean of its divisors is an integer number (3604440).

Almost surely, 2^37999989 is an apocalyptic number.

It is an amenable number.

37999989 is a deficient number, since it is larger than the sum of its proper divisors (19671051).

37999989 is a wasteful number, since it uses less digits than its factorization.

37999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34377 (or 34371 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 63.

The square root of 37999989 is about 6164.4131107511. The cubic root of 37999989 is about 336.1975082398.

The spelling of 37999989 in words is "thirty-seven million, nine hundred ninety-nine thousand, nine hundred eighty-nine".