37991107 has 16 divisors (see below), whose sum is σ = 50153472. Its totient is φ = 27861120.

The previous prime is 37991081. The next prime is 37991111. The reversal of 37991107 is 70119973.

It is not a de Polignac number, because 37991107 - 2¹⁵ = 37958339 is a prime.

It is a super-2 number, since 2×37991107² = 2886648422170898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37991167) 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, 13203 + ... + 15820.

It is an arithmetic number, because the mean of its divisors is an integer number (3134592).

Almost surely, 2^37991107 is an apocalyptic number.

37991107 is a deficient number, since it is larger than the sum of its proper divisors (12162365).

37991107 is a wasteful number, since it uses less digits than its factorization.

37991107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29058.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 37991107 is about 6163.6926432132. The cubic root of 37991107 is about 336.1713122765.

The spelling of 37991107 in words is "thirty-seven million, nine hundred ninety-one thousand, one hundred seven".