3990737 has 2 divisors, whose sum is σ = 3990738. Its totient is φ = 3990736.

The previous prime is 3990731. The next prime is 3990761. The reversal of 3990737 is 7370993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2588881 + 1401856 = 1609^2 + 1184^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990737 - 2¹² = 3986641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3990737.

It is not a weakly prime, because it can be changed into another prime (3990731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995368 + 1995369.

It is an arithmetic number, because the mean of its divisors is an integer number (1995369).

Almost surely, 2^3990737 is an apocalyptic number.

It is an amenable number.

3990737 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990737 is an equidigital number, since it uses as much as digits as its factorization.

3990737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 38.

The square root of 3990737 is about 1997.6829077709. The cubic root of 3990737 is about 158.6174763559.

The spelling of 3990737 in words is "three million, nine hundred ninety thousand, seven hundred thirty-seven".