398877695369 has 2 divisors, whose sum is σ = 398877695370. Its totient is φ = 398877695368.

The previous prime is 398877695341. The next prime is 398877695371. The reversal of 398877695369 is 963596778893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396285358144 + 2592337225 = 629512^2 + 50915^2 .

It is a cyclic number.

It is not a de Polignac number, because 398877695369 - 2³⁶ = 330158218633 is a prime.

It is a super-2 number, since 2×398877695369² (a number of 24 digits) contains 22 as substring.

Together with 398877695371, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 398877695293 and 398877695302.

It is not a weakly prime, because it can be changed into another prime (398877695389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199438847684 + 199438847685.

It is an arithmetic number, because the mean of its divisors is an integer number (199438847685).

Almost surely, 2^398877695369 is an apocalyptic number.

It is an amenable number.

398877695369 is a deficient number, since it is larger than the sum of its proper divisors (1).

398877695369 is an equidigital number, since it uses as much as digits as its factorization.

398877695369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3703553280, while the sum is 80.

The spelling of 398877695369 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, six hundred ninety-five thousand, three hundred sixty-nine".