37993091 has 2 divisors, whose sum is σ = 37993092. Its totient is φ = 37993090.

The previous prime is 37993051. The next prime is 37993093. The reversal of 37993091 is 19039973.

It is a strong prime.

It is an emirp because it is prime and its reverse (19039973) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37993091 is a prime.

Together with 37993093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37993093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18996545 + 18996546.

It is an arithmetic number, because the mean of its divisors is an integer number (18996546).

Almost surely, 2^37993091 is an apocalyptic number.

37993091 is a deficient number, since it is larger than the sum of its proper divisors (1).

37993091 is an equidigital number, since it uses as much as digits as its factorization.

37993091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 37993091 is about 6163.8535835952. The cubic root of 37993091 is about 336.1771641045.

The spelling of 37993091 in words is "thirty-seven million, nine hundred ninety-three thousand, ninety-one".