199998707 has 2 divisors, whose sum is σ = 199998708. Its totient is φ = 199998706.

The previous prime is 199998661. The next prime is 199998713. The reversal of 199998707 is 707899991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199998707 - 2¹⁶ = 199933171 is a prime.

It is not a weakly prime, because it can be changed into another prime (199998107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999353 + 99999354.

It is an arithmetic number, because the mean of its divisors is an integer number (99999354).

Almost surely, 2^199998707 is an apocalyptic number.

199998707 is a deficient number, since it is larger than the sum of its proper divisors (1).

199998707 is an equidigital number, since it uses as much as digits as its factorization.

199998707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 199998707 is about 14142.0899092037. The cubic root of 199998707 is about 584.8022873882.

The spelling of 199998707 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred seven".