37491887 has 2 divisors, whose sum is σ = 37491888. Its totient is φ = 37491886.

The previous prime is 37491877. The next prime is 37491889. The reversal of 37491887 is 78819473.

37491887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 37491887 - 2⁴ = 37491871 is a prime.

Together with 37491889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37491889) 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 as a sum of consecutive naturals, namely, 18745943 + 18745944.

It is an arithmetic number, because the mean of its divisors is an integer number (18745944).

Almost surely, 2^37491887 is an apocalyptic number.

37491887 is a deficient number, since it is larger than the sum of its proper divisors (1).

37491887 is an equidigital number, since it uses as much as digits as its factorization.

37491887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 37491887 is about 6123.0618974497. The cubic root of 37491887 is about 334.6923350356.

The spelling of 37491887 in words is "thirty-seven million, four hundred ninety-one thousand, eight hundred eighty-seven".