199997699 has 8 divisors (see below), whose sum is σ = 221253120. Its totient is φ = 179254600.

The previous prime is 199997689. The next prime is 199997723. The reversal of 199997699 is 996799991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199997699 - 2¹² = 199993603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199997689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127259 + ... + 128820.

It is an arithmetic number, because the mean of its divisors is an integer number (27656640).

Almost surely, 2^199997699 is an apocalyptic number.

199997699 is a deficient number, since it is larger than the sum of its proper divisors (21255421).

199997699 is a wasteful number, since it uses less digits than its factorization.

199997699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256161.

The product of its digits is 22320522, while the sum is 68.

The square root of 199997699 is about 14142.0542708618. The cubic root of 199997699 is about 584.8013049124.

The spelling of 199997699 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, six hundred ninety-nine".