37890157 has 2 divisors, whose sum is σ = 37890158. Its totient is φ = 37890156.

The previous prime is 37890137. The next prime is 37890163. The reversal of 37890157 is 75109873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32787076 + 5103081 = 5726^2 + 2259^2 .

It is an emirp because it is prime and its reverse (75109873) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37890157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37890107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18945078 + 18945079.

It is an arithmetic number, because the mean of its divisors is an integer number (18945079).

Almost surely, 2^37890157 is an apocalyptic number.

It is an amenable number.

37890157 is a deficient number, since it is larger than the sum of its proper divisors (1).

37890157 is an equidigital number, since it uses as much as digits as its factorization.

37890157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 37890157 is about 6155.4981114448. The cubic root of 37890157 is about 335.8732899251.

The spelling of 37890157 in words is "thirty-seven million, eight hundred ninety thousand, one hundred fifty-seven".