398877574873 has 2 divisors, whose sum is σ = 398877574874. Its totient is φ = 398877574872.

The previous prime is 398877574871. The next prime is 398877574877. The reversal of 398877574873 is 378475778893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233876697664 + 165000877209 = 483608^2 + 406203^2 .

It is a cyclic number.

It is not a de Polignac number, because 398877574873 - 2¹ = 398877574871 is a prime.

It is a super-2 number, since 2×398877574873² (a number of 24 digits) contains 22 as substring.

Together with 398877574871, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 398877574873.

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, 199438787436 + 199438787437.

It is an arithmetic number, because the mean of its divisors is an integer number (199438787437).

Almost surely, 2^398877574873 is an apocalyptic number.

It is an amenable number.

398877574873 is a deficient number, since it is larger than the sum of its proper divisors (1).

398877574873 is an equidigital number, since it uses as much as digits as its factorization.

398877574873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1991485440, while the sum is 76.

The spelling of 398877574873 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, five hundred seventy-four thousand, eight hundred seventy-three".