37987997 has 8 divisors (see below), whose sum is σ = 38470200. Its totient is φ = 37509120.

The previous prime is 37987993. The next prime is 37988009. The reversal of 37987997 is 79978973.

37987997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 34798201 = 1786^2 + 5899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 37987997 - 2² = 37987993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37987993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28097 + ... + 29417.

It is an arithmetic number, because the mean of its divisors is an integer number (4808775).

Almost surely, 2^37987997 is an apocalyptic number.

It is an amenable number.

37987997 is a deficient number, since it is larger than the sum of its proper divisors (482203).

37987997 is a wasteful number, since it uses less digits than its factorization.

37987997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663.

The product of its digits is 6001128, while the sum is 59.

The square root of 37987997 is about 6163.4403542178. The cubic root of 37987997 is about 336.1621388901.

The spelling of 37987997 in words is "thirty-seven million, nine hundred eighty-seven thousand, nine hundred ninety-seven".