3990913 has 2 divisors, whose sum is σ = 3990914. Its totient is φ = 3990912.

The previous prime is 3990907. The next prime is 3990919. The reversal of 3990913 is 3190993.

It is a happy number.

3990913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3990907) and next prime (3990919).

It can be written as a sum of positive squares in only one way, i.e., 3122289 + 868624 = 1767^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990913 - 2¹³ = 3982721 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3990919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995456 + 1995457.

It is an arithmetic number, because the mean of its divisors is an integer number (1995457).

Almost surely, 2^3990913 is an apocalyptic number.

It is an amenable number.

3990913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990913 is an equidigital number, since it uses as much as digits as its factorization.

3990913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 3990913 is about 1997.7269583204. The cubic root of 3990913 is about 158.6198081112.

The spelling of 3990913 in words is "three million, nine hundred ninety thousand, nine hundred thirteen".