37668749 has 2 divisors, whose sum is σ = 37668750. Its totient is φ = 37668748.

The previous prime is 37668721. The next prime is 37668769. The reversal of 37668749 is 94786673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 9259849 = 5330^2 + 3043^2 .

It is an emirp because it is prime and its reverse (94786673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37668749 - 2⁸ = 37668493 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 37668697 and 37668706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37668769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18834374 + 18834375.

It is an arithmetic number, because the mean of its divisors is an integer number (18834375).

Almost surely, 2^37668749 is an apocalyptic number.

It is an amenable number.

37668749 is a deficient number, since it is larger than the sum of its proper divisors (1).

37668749 is an equidigital number, since it uses as much as digits as its factorization.

37668749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 37668749 is about 6137.4871893960. The cubic root of 37668749 is about 335.2177955524.

The spelling of 37668749 in words is "thirty-seven million, six hundred sixty-eight thousand, seven hundred forty-nine".