3998401577 has 2 divisors, whose sum is σ = 3998401578. Its totient is φ = 3998401576.

The previous prime is 3998401523. The next prime is 3998401639. The reversal of 3998401577 is 7751048993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2058527641 + 1939873936 = 45371^2 + 44044^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998401577 - 2⁸ = 3998401321 is a prime.

It is not a weakly prime, because it can be changed into another prime (3998401177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999200788 + 1999200789.

It is an arithmetic number, because the mean of its divisors is an integer number (1999200789).

Almost surely, 2^3998401577 is an apocalyptic number.

It is an amenable number.

3998401577 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998401577 is an equidigital number, since it uses as much as digits as its factorization.

3998401577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 3998401577 is about 63232.9152973355. The cubic root of 3998401577 is about 1587.1895789344.

The spelling of 3998401577 in words is "three billion, nine hundred ninety-eight million, four hundred one thousand, five hundred seventy-seven".