37990961 has 2 divisors, whose sum is σ = 37990962. Its totient is φ = 37990960.

The previous prime is 37990951. The next prime is 37990991. The reversal of 37990961 is 16909973.

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., 27363361 + 10627600 = 5231^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 37990961 - 2¹⁰ = 37989937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (37990921) 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, 18995480 + 18995481.

It is an arithmetic number, because the mean of its divisors is an integer number (18995481).

Almost surely, 2^37990961 is an apocalyptic number.

It is an amenable number.

37990961 is a deficient number, since it is larger than the sum of its proper divisors (1).

37990961 is an equidigital number, since it uses as much as digits as its factorization.

37990961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 37990961 is about 6163.6807996521. The cubic root of 37990961 is about 336.1708816399.

The spelling of 37990961 in words is "thirty-seven million, nine hundred ninety thousand, nine hundred sixty-one".