998712331 has 2 divisors, whose sum is σ = 998712332. Its totient is φ = 998712330.

The previous prime is 998712301. The next prime is 998712347. The reversal of 998712331 is 133217899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998712331 - 2²⁵ = 965157899 is a prime.

It is a super-2 number, since 2×998712331² = 1994852640182907122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998712301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499356165 + 499356166.

It is an arithmetic number, because the mean of its divisors is an integer number (499356166).

Almost surely, 2^998712331 is an apocalyptic number.

998712331 is a deficient number, since it is larger than the sum of its proper divisors (1).

998712331 is an equidigital number, since it uses as much as digits as its factorization.

998712331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 998712331 is about 31602.4102087167. The cubic root of 998712331 is about 999.5705926357.

The spelling of 998712331 in words is "nine hundred ninety-eight million, seven hundred twelve thousand, three hundred thirty-one".