190691895 has 16 divisors (see below), whose sum is σ = 313354080. Its totient is φ = 98953344.

The previous prime is 190691887. The next prime is 190691899. The reversal of 190691895 is 598196091.

It is not a de Polignac number, because 190691895 - 2³ = 190691887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190691899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171240 + ... + 172349.

It is an arithmetic number, because the mean of its divisors is an integer number (19584630).

Almost surely, 2^190691895 is an apocalyptic number.

190691895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

190691895 is a deficient number, since it is larger than the sum of its proper divisors (122662185).

190691895 is a wasteful number, since it uses less digits than its factorization.

190691895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343634.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 190691895 is about 13809.1236144804. The cubic root of 190691895 is about 575.5866929182.

The spelling of 190691895 in words is "one hundred ninety million, six hundred ninety-one thousand, eight hundred ninety-five".