191092401 has 24 divisors (see below), whose sum is σ = 290324736. Its totient is φ = 120949920.

The previous prime is 191092399. The next prime is 191092403. The reversal of 191092401 is 104290191.

It is an interprime number because it is at equal distance from previous prime (191092399) and next prime (191092403).

It is not a de Polignac number, because 191092401 - 2¹ = 191092399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191092403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8326 + ... + 21248.

It is an arithmetic number, because the mean of its divisors is an integer number (12096864).

Almost surely, 2^191092401 is an apocalyptic number.

It is an amenable number.

191092401 is a deficient number, since it is larger than the sum of its proper divisors (99232335).

191092401 is a wasteful number, since it uses less digits than its factorization.

191092401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013 (or 13010 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 191092401 is about 13823.6175077293. The cubic root of 191092401 is about 575.9893751657.

The spelling of 191092401 in words is "one hundred ninety-one million, ninety-two thousand, four hundred one".