199662079 has 2 divisors, whose sum is σ = 199662080. Its totient is φ = 199662078.

The previous prime is 199662037. The next prime is 199662083. The reversal of 199662079 is 970266991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199662079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199662679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99831039 + 99831040.

It is an arithmetic number, because the mean of its divisors is an integer number (99831040).

Almost surely, 2^199662079 is an apocalyptic number.

199662079 is a deficient number, since it is larger than the sum of its proper divisors (1).

199662079 is an equidigital number, since it uses as much as digits as its factorization.

199662079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 199662079 is about 14130.1832613735. The cubic root of 199662079 is about 584.4739996381.

The spelling of 199662079 in words is "one hundred ninety-nine million, six hundred sixty-two thousand, seventy-nine".