37994909 has 2 divisors, whose sum is σ = 37994910. Its totient is φ = 37994908.

The previous prime is 37994903. The next prime is 37994917. The reversal of 37994909 is 90949973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27269284 + 10725625 = 5222^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 37994909 - 2²⁰ = 36946333 is a prime.

It is a super-2 number, since 2×37994909² = 2887226219836562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37994903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18997454 + 18997455.

It is an arithmetic number, because the mean of its divisors is an integer number (18997455).

Almost surely, 2^37994909 is an apocalyptic number.

It is an amenable number.

37994909 is a deficient number, since it is larger than the sum of its proper divisors (1).

37994909 is an equidigital number, since it uses as much as digits as its factorization.

37994909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 37994909 is about 6164.0010545100. The cubic root of 37994909 is about 336.1825261350.

The spelling of 37994909 in words is "thirty-seven million, nine hundred ninety-four thousand, nine hundred nine".