37868009 has 2 divisors, whose sum is σ = 37868010. Its totient is φ = 37868008.

The previous prime is 37867981. The next prime is 37868011. The reversal of 37868009 is 90086873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33028009 + 4840000 = 5747^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37868009 is a prime.

It is a super-2 number, since 2×37868009² = 2867972211248162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 37868011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (37868069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18934004 + 18934005.

It is an arithmetic number, because the mean of its divisors is an integer number (18934005).

Almost surely, 2^37868009 is an apocalyptic number.

It is an amenable number.

37868009 is a deficient number, since it is larger than the sum of its proper divisors (1).

37868009 is an equidigital number, since it uses as much as digits as its factorization.

37868009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 37868009 is about 6153.6988064090. The cubic root of 37868009 is about 335.8078343018.

The spelling of 37868009 in words is "thirty-seven million, eight hundred sixty-eight thousand, nine".