190775891 has 8 divisors (see below), whose sum is σ = 203721600. Its totient is φ = 178254720.

The previous prime is 190775839. The next prime is 190775899. The reversal of 190775891 is 198577091.

190775891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190775891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190775899) 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, 105206 + ... + 107003.

It is an arithmetic number, because the mean of its divisors is an integer number (25465200).

Almost surely, 2^190775891 is an apocalyptic number.

190775891 is a deficient number, since it is larger than the sum of its proper divisors (12945709).

190775891 is a wasteful number, since it uses less digits than its factorization.

190775891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212269.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 190775891 is about 13812.1646022627. The cubic root of 190775891 is about 575.6711920225.

The spelling of 190775891 in words is "one hundred ninety million, seven hundred seventy-five thousand, eight hundred ninety-one".