191092642 has 16 divisors (see below), whose sum is σ = 317032632. Its totient is φ = 85812480.

The previous prime is 191092639. The next prime is 191092651. The reversal of 191092642 is 246290191.

It can be written as a sum of positive squares in 4 ways, for example, as 187991521 + 3101121 = 13711^2 + 1761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 191092598 and 191092607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98359 + ... + 100282.

Almost surely, 2^191092642 is an apocalyptic number.

191092642 is a deficient number, since it is larger than the sum of its proper divisors (125939990).

191092642 is a wasteful number, since it uses less digits than its factorization.

191092642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198693.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 191092642 is about 13823.6262246923. The cubic root of 191092642 is about 575.9896173058.

The spelling of 191092642 in words is "one hundred ninety-one million, ninety-two thousand, six hundred forty-two".