190930091 has 4 divisors (see below), whose sum is σ = 208287384. Its totient is φ = 173572800.

The previous prime is 190930079. The next prime is 190930099. The reversal of 190930091 is 190039091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 190930091 - 2¹⁴ = 190913707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190930099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8678630 + ... + 8678651.

It is an arithmetic number, because the mean of its divisors is an integer number (52071846).

Almost surely, 2^190930091 is an apocalyptic number.

190930091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190930091 is a deficient number, since it is larger than the sum of its proper divisors (17357293).

190930091 is a wasteful number, since it uses less digits than its factorization.

190930091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17357292.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 190930091 is about 13817.7455107554. The cubic root of 190930091 is about 575.8262510843.

The spelling of 190930091 in words is "one hundred ninety million, nine hundred thirty thousand, ninety-one".