37985971 has 2 divisors, whose sum is σ = 37985972. Its totient is φ = 37985970.

The previous prime is 37985957. The next prime is 37985989. The reversal of 37985971 is 17958973.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37985971 - 2⁹ = 37985459 is a prime.

It is not a weakly prime, because it can be changed into another prime (37985951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18992985 + 18992986.

It is an arithmetic number, because the mean of its divisors is an integer number (18992986).

Almost surely, 2^37985971 is an apocalyptic number.

37985971 is a deficient number, since it is larger than the sum of its proper divisors (1).

37985971 is an equidigital number, since it uses as much as digits as its factorization.

37985971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 37985971 is about 6163.2759957672. The cubic root of 37985971 is about 336.1561626462.

The spelling of 37985971 in words is "thirty-seven million, nine hundred eighty-five thousand, nine hundred seventy-one".