191910113 has 8 divisors (see below), whose sum is σ = 193198080. Its totient is φ = 190626480.

The previous prime is 191910109. The next prime is 191910133. The reversal of 191910113 is 311019191.

It is a happy number.

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 191910113 - 2² = 191910109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191910133) 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, 149408 + ... + 150686.

It is an arithmetic number, because the mean of its divisors is an integer number (24149760).

Almost surely, 2^191910113 is an apocalyptic number.

It is an amenable number.

191910113 is a deficient number, since it is larger than the sum of its proper divisors (1287967).

191910113 is a wasteful number, since it uses less digits than its factorization.

191910113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167.

The product of its (nonzero) digits is 243, while the sum is 26.

The square root of 191910113 is about 13853.1625631117. The cubic root of 191910113 is about 576.8097866486.

The spelling of 191910113 in words is "one hundred ninety-one million, nine hundred ten thousand, one hundred thirteen".