3998090797 has 2 divisors, whose sum is σ = 3998090798. Its totient is φ = 3998090796.

The previous prime is 3998090749. The next prime is 3998090839. The reversal of 3998090797 is 7970908993.

3998090797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2717953956 + 1280136841 = 52134^2 + 35779^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998090797 - 2¹¹ = 3998088749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998090497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999045398 + 1999045399.

It is an arithmetic number, because the mean of its divisors is an integer number (1999045399).

Almost surely, 2^3998090797 is an apocalyptic number.

It is an amenable number.

3998090797 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998090797 is an equidigital number, since it uses as much as digits as its factorization.

3998090797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7715736, while the sum is 61.

The square root of 3998090797 is about 63230.4578269049. The cubic root of 3998090797 is about 1587.1484558716.

The spelling of 3998090797 in words is "three billion, nine hundred ninety-eight million, ninety thousand, seven hundred ninety-seven".