37971961 has 2 divisors, whose sum is σ = 37971962. Its totient is φ = 37971960.

The previous prime is 37971929. The next prime is 37971977. The reversal of 37971961 is 16917973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37896336 + 75625 = 6156^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 37971961 - 2⁵ = 37971929 is a prime.

It is not a weakly prime, because it can be changed into another prime (37071961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18985980 + 18985981.

It is an arithmetic number, because the mean of its divisors is an integer number (18985981).

Almost surely, 2^37971961 is an apocalyptic number.

It is an amenable number.

37971961 is a deficient number, since it is larger than the sum of its proper divisors (1).

37971961 is an equidigital number, since it uses as much as digits as its factorization.

37971961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 37971961 is about 6162.1393200738. The cubic root of 37971961 is about 336.1148304840.

The spelling of 37971961 in words is "thirty-seven million, nine hundred seventy-one thousand, nine hundred sixty-one".