37879381 has 2 divisors, whose sum is σ = 37879382. Its totient is φ = 37879380.

The previous prime is 37879363. The next prime is 37879397. The reversal of 37879381 is 18397873.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25664356 + 12215025 = 5066^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 37879381 - 2⁷ = 37879253 is a prime.

It is a super-2 number, since 2×37879381² = 2869695009886322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37879301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18939690 + 18939691.

It is an arithmetic number, because the mean of its divisors is an integer number (18939691).

Almost surely, 2^37879381 is an apocalyptic number.

It is an amenable number.

37879381 is a deficient number, since it is larger than the sum of its proper divisors (1).

37879381 is an equidigital number, since it uses as much as digits as its factorization.

37879381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 37879381 is about 6154.6227341731. The cubic root of 37879381 is about 335.8414460019.

The spelling of 37879381 in words is "thirty-seven million, eight hundred seventy-nine thousand, three hundred eighty-one".