198699993 has 16 divisors (see below), whose sum is σ = 296352000. Its totient is φ = 131574960.

The previous prime is 198699989. The next prime is 198700031. The reversal of 198699993 is 399996891.

It is not a de Polignac number, because 198699993 - 2² = 198699989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198699993.

It is not an unprimeable number, because it can be changed into a prime (198691993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20673 + ... + 28718.

It is an arithmetic number, because the mean of its divisors is an integer number (18522000).

Almost surely, 2^198699993 is an apocalyptic number.

It is an amenable number.

198699993 is a deficient number, since it is larger than the sum of its proper divisors (97652007).

198699993 is a wasteful number, since it uses less digits than its factorization.

198699993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49549 (or 49543 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The square root of 198699993 is about 14096.0985027773. The cubic root of 198699993 is about 583.5337111523.

The spelling of 198699993 in words is "one hundred ninety-eight million, six hundred ninety-nine thousand, nine hundred ninety-three".