191140906 has 16 divisors (see below), whose sum is σ = 314773920. Its totient is φ = 86327280.

The previous prime is 191140897. The next prime is 191140919. The reversal of 191140906 is 609041191.

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, 24216 + ... + 31123.

It is an arithmetic number, because the mean of its divisors is an integer number (19673370).

Almost surely, 2^191140906 is an apocalyptic number.

191140906 is a deficient number, since it is larger than the sum of its proper divisors (123633014).

191140906 is a wasteful number, since it uses less digits than its factorization.

191140906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55509.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 191140906 is about 13825.3718214014. The cubic root of 191140906 is about 576.0381055198.

The spelling of 191140906 in words is "one hundred ninety-one million, one hundred forty thousand, nine hundred six".