398899311 has 4 divisors (see below), whose sum is σ = 531865752. Its totient is φ = 265932872.

The previous prime is 398899301. The next prime is 398899337. The reversal of 398899311 is 113998893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113998893 = 3 ⋅37999631.

It is a cyclic number.

It is not a de Polignac number, because 398899311 - 2⁵ = 398899279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398899301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66483216 + ... + 66483221.

It is an arithmetic number, because the mean of its divisors is an integer number (132966438).

Almost surely, 2^398899311 is an apocalyptic number.

398899311 is a deficient number, since it is larger than the sum of its proper divisors (132966441).

398899311 is a wasteful number, since it uses less digits than its factorization.

398899311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132966440.

The product of its digits is 419904, while the sum is 51.

The square root of 398899311 is about 19972.4638189684. The cubic root of 398899311 is about 736.1298500565.

The spelling of 398899311 in words is "three hundred ninety-eight million, eight hundred ninety-nine thousand, three hundred eleven".