199749698 has 16 divisors (see below), whose sum is σ = 317520000. Its totient is φ = 93980592.

The previous prime is 199749689. The next prime is 199749701. The reversal of 199749698 is 896947991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199749698.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11978 + ... + 23301.

It is an arithmetic number, because the mean of its divisors is an integer number (19845000).

Almost surely, 2^199749698 is an apocalyptic number.

199749698 is a deficient number, since it is larger than the sum of its proper divisors (117770302).

199749698 is a wasteful number, since it uses less digits than its factorization.

199749698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35449.

The product of its digits is 8817984, while the sum is 62.

The square root of 199749698 is about 14133.2833411066. The cubic root of 199749698 is about 584.5594833019.

The spelling of 199749698 in words is "one hundred ninety-nine million, seven hundred forty-nine thousand, six hundred ninety-eight".