199068749 has 8 divisors (see below), whose sum is σ = 226608192. Its totient is φ = 173103040.

The previous prime is 199068739. The next prime is 199068781. The reversal of 199068749 is 947860991.

It is a happy number.

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

It is not a de Polignac number, because 199068749 - 2⁴ = 199068733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199068749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199068739) 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, 393164 + ... + 393669.

It is an arithmetic number, because the mean of its divisors is an integer number (28326024).

Almost surely, 2^199068749 is an apocalyptic number.

It is an amenable number.

199068749 is a deficient number, since it is larger than the sum of its proper divisors (27539443).

199068749 is a wasteful number, since it uses less digits than its factorization.

199068749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786867.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 199068749 is about 14109.1725129435. The cubic root of 199068749 is about 583.8944703998.

The spelling of 199068749 in words is "one hundred ninety-nine million, sixty-eight thousand, seven hundred forty-nine".