190687091 has 8 divisors (see below), whose sum is σ = 220086624. Its totient is φ = 161827200.

The previous prime is 190687073. The next prime is 190687111. The reversal of 190687091 is 190786091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190687091 - 2²⁶ = 123578227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190687031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134150 + ... + 135563.

It is an arithmetic number, because the mean of its divisors is an integer number (27510828).

Almost surely, 2^190687091 is an apocalyptic number.

190687091 is a deficient number, since it is larger than the sum of its proper divisors (29399533).

190687091 is a wasteful number, since it uses less digits than its factorization.

190687091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269821.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 190687091 is about 13808.9496704130. The cubic root of 190687091 is about 575.5818593940.

The spelling of 190687091 in words is "one hundred ninety million, six hundred eighty-seven thousand, ninety-one".