191009150 has 24 divisors (see below), whose sum is σ = 356863320. Its totient is φ = 76062560.

The previous prime is 191009149. The next prime is 191009171. The reversal of 191009150 is 51900191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2936 + ... + 19764.

It is an arithmetic number, because the mean of its divisors is an integer number (14869305).

Almost surely, 2^191009150 is an apocalyptic number.

191009150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191009150 is a deficient number, since it is larger than the sum of its proper divisors (165854170).

191009150 is a wasteful number, since it uses less digits than its factorization.

191009150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17068 (or 17063 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 191009150 is about 13820.6059925026. The cubic root of 191009150 is about 575.9057181558.

The spelling of 191009150 in words is "one hundred ninety-one million, nine thousand, one hundred fifty".