191399292 has 54 divisors (see below), whose sum is σ = 562810248. Its totient is φ = 54685008.

The previous prime is 191399269. The next prime is 191399303. The reversal of 191399292 is 292993191.

191399292 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 52488 + ... + 56015.

It is an arithmetic number, because the mean of its divisors is an integer number (10422412).

Almost surely, 2^191399292 is an apocalyptic number.

191399292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191399292 is an abundant number, since it is smaller than the sum of its proper divisors (371410956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191399292 is a wasteful number, since it uses less digits than its factorization.

191399292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108527 (or 108515 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 191399292 is about 13834.7132966318. The cubic root of 191399292 is about 576.2975531485.

The spelling of 191399292 in words is "one hundred ninety-one million, three hundred ninety-nine thousand, two hundred ninety-two".