37491889 has 2 divisors, whose sum is σ = 37491890. Its totient is φ = 37491888.

The previous prime is 37491887. The next prime is 37491901. The reversal of 37491889 is 98819473.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23203489 + 14288400 = 4817^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 37491889 - 2¹ = 37491887 is a prime.

Together with 37491887, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37491887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18745944 + 18745945.

It is an arithmetic number, because the mean of its divisors is an integer number (18745945).

Almost surely, 2^37491889 is an apocalyptic number.

It is an amenable number.

37491889 is a deficient number, since it is larger than the sum of its proper divisors (1).

37491889 is an equidigital number, since it uses as much as digits as its factorization.

37491889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 37491889 is about 6123.0620607667. The cubic root of 37491889 is about 334.6923409870.

The spelling of 37491889 in words is "thirty-seven million, four hundred ninety-one thousand, eight hundred eighty-nine".