198930031 has 2 divisors, whose sum is σ = 198930032. Its totient is φ = 198930030.

The previous prime is 198930023. The next prime is 198930047. The reversal of 198930031 is 130039891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198930031 - 2³ = 198930023 is a prime.

It is a super-2 number, since 2×198930031² = 79146314467321922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198930331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99465015 + 99465016.

It is an arithmetic number, because the mean of its divisors is an integer number (99465016).

Almost surely, 2^198930031 is an apocalyptic number.

198930031 is a deficient number, since it is larger than the sum of its proper divisors (1).

198930031 is an equidigital number, since it uses as much as digits as its factorization.

198930031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 198930031 is about 14104.2557761833. The cubic root of 198930031 is about 583.7588129203.

The spelling of 198930031 in words is "one hundred ninety-eight million, nine hundred thirty thousand, thirty-one".