37385021 has 2 divisors, whose sum is σ = 37385022. Its totient is φ = 37385020.

The previous prime is 37384987. The next prime is 37385053. The reversal of 37385021 is 12058373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 7562500 = 5461^2 + 2750^2 .

It is an emirp because it is prime and its reverse (12058373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37385021 - 2¹⁴ = 37368637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37285021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18692510 + 18692511.

It is an arithmetic number, because the mean of its divisors is an integer number (18692511).

Almost surely, 2^37385021 is an apocalyptic number.

It is an amenable number.

37385021 is a deficient number, since it is larger than the sum of its proper divisors (1).

37385021 is an equidigital number, since it uses as much as digits as its factorization.

37385021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 37385021 is about 6114.3291537175. The cubic root of 37385021 is about 334.3740326755.

The spelling of 37385021 in words is "thirty-seven million, three hundred eighty-five thousand, twenty-one".