998907659 has 2 divisors, whose sum is σ = 998907660. Its totient is φ = 998907658.

The previous prime is 998907643. The next prime is 998907667. The reversal of 998907659 is 956709899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998907659 - 2⁴ = 998907643 is a prime.

It is a super-2 number, since 2×998907659² = 1995633022417720562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998907629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499453829 + 499453830.

It is an arithmetic number, because the mean of its divisors is an integer number (499453830).

Almost surely, 2^998907659 is an apocalyptic number.

998907659 is a deficient number, since it is larger than the sum of its proper divisors (1).

998907659 is an equidigital number, since it uses as much as digits as its factorization.

998907659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 62.

The square root of 998907659 is about 31605.5004548259. The cubic root of 998907659 is about 999.6357536741.

The spelling of 998907659 in words is "nine hundred ninety-eight million, nine hundred seven thousand, six hundred fifty-nine".