198928831 has 2 divisors, whose sum is σ = 198928832. Its totient is φ = 198928830.

The previous prime is 198928823. The next prime is 198928837. The reversal of 198928831 is 138829891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198928831 - 2³ = 198928823 is a prime.

It is a super-2 number, since 2×198928831² = 79145359606053122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198928837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99464415 + 99464416.

It is an arithmetic number, because the mean of its divisors is an integer number (99464416).

Almost surely, 2^198928831 is an apocalyptic number.

198928831 is a deficient number, since it is larger than the sum of its proper divisors (1).

198928831 is an equidigital number, since it uses as much as digits as its factorization.

198928831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 49.

The square root of 198928831 is about 14104.2132357675. The cubic root of 198928831 is about 583.7576391207.

The spelling of 198928831 in words is "one hundred ninety-eight million, nine hundred twenty-eight thousand, eight hundred thirty-one".