37920973 has 2 divisors, whose sum is σ = 37920974. Its totient is φ = 37920972.

The previous prime is 37920943. The next prime is 37920989. The reversal of 37920973 is 37902973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37920964 + 9 = 6158^2 + 3^2 .

It is an emirp because it is prime and its reverse (37902973) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37920973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37920913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18960486 + 18960487.

It is an arithmetic number, because the mean of its divisors is an integer number (18960487).

Almost surely, 2^37920973 is an apocalyptic number.

It is an amenable number.

37920973 is a deficient number, since it is larger than the sum of its proper divisors (1).

37920973 is an equidigital number, since it uses as much as digits as its factorization.

37920973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 37920973 is about 6158.0007307567. Note that the first 3 decimals coincide. The cubic root of 37920973 is about 335.9643203090.

The spelling of 37920973 in words is "thirty-seven million, nine hundred twenty thousand, nine hundred seventy-three".