37791961 has 2 divisors, whose sum is σ = 37791962. Its totient is φ = 37791960.

The previous prime is 37791947. The next prime is 37791977. The reversal of 37791961 is 16919773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37454400 + 337561 = 6120^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 37791961 - 2¹³ = 37783769 is a prime.

It is not a weakly prime, because it can be changed into another prime (37791161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18895980 + 18895981.

It is an arithmetic number, because the mean of its divisors is an integer number (18895981).

Almost surely, 2^37791961 is an apocalyptic number.

It is an amenable number.

37791961 is a deficient number, since it is larger than the sum of its proper divisors (1).

37791961 is an equidigital number, since it uses as much as digits as its factorization.

37791961 is an evil number, because the sum of its binary digits is even.

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

The square root of 37791961 is about 6147.5166530885. The cubic root of 37791961 is about 335.5828895609.

The spelling of 37791961 in words is "thirty-seven million, seven hundred ninety-one thousand, nine hundred sixty-one".