398131199 has 4 divisors (see below), whose sum is σ = 398197536. Its totient is φ = 398064864.

The previous prime is 398131189. The next prime is 398131229. The reversal of 398131199 is 991131893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991131893 = 23 ⋅43092691.

It is a cyclic number.

It is not a de Polignac number, because 398131199 - 2⁴ = 398131183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398131189) 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, 23159 + ... + 36504.

It is an arithmetic number, because the mean of its divisors is an integer number (99549384).

Almost surely, 2^398131199 is an apocalyptic number.

398131199 is a deficient number, since it is larger than the sum of its proper divisors (66337).

398131199 is an equidigital number, since it uses as much as digits as its factorization.

398131199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66336.

The product of its digits is 52488, while the sum is 44.

The square root of 398131199 is about 19953.2252781349. The cubic root of 398131199 is about 735.6570544819.

The spelling of 398131199 in words is "three hundred ninety-eight million, one hundred thirty-one thousand, one hundred ninety-nine".