398877574841 has 2 divisors, whose sum is σ = 398877574842. Its totient is φ = 398877574840.

The previous prime is 398877574807. The next prime is 398877574871. The reversal of 398877574841 is 148475778893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398874349225 + 3225616 = 631565^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 398877574841 - 2¹⁰ = 398877573817 is a prime.

It is a super-2 number, since 2×398877574841² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (398877574871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199438787420 + 199438787421.

It is an arithmetic number, because the mean of its divisors is an integer number (199438787421).

Almost surely, 2^398877574841 is an apocalyptic number.

It is an amenable number.

398877574841 is a deficient number, since it is larger than the sum of its proper divisors (1).

398877574841 is an equidigital number, since it uses as much as digits as its factorization.

398877574841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 379330560, while the sum is 71.

The spelling of 398877574841 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, five hundred seventy-four thousand, eight hundred forty-one".