198965659 has 2 divisors, whose sum is σ = 198965660. Its totient is φ = 198965658.

The previous prime is 198965651. The next prime is 198965699. The reversal of 198965659 is 956569891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198965659 - 2³ = 198965651 is a prime.

It is a super-2 number, since 2×198965659² = 79174666922608562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198965651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99482829 + 99482830.

It is an arithmetic number, because the mean of its divisors is an integer number (99482830).

Almost surely, 2^198965659 is an apocalyptic number.

198965659 is a deficient number, since it is larger than the sum of its proper divisors (1).

198965659 is an equidigital number, since it uses as much as digits as its factorization.

198965659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 58.

The square root of 198965659 is about 14105.5187426766. The cubic root of 198965659 is about 583.7936608806.

The spelling of 198965659 in words is "one hundred ninety-eight million, nine hundred sixty-five thousand, six hundred fifty-nine".