190870865 has 8 divisors (see below), whose sum is σ = 241100160. Its totient is φ = 144659952.

The previous prime is 190870817. The next prime is 190870871. The reversal of 190870865 is 568078091.

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 190870865 - 2⁸ = 190870609 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004489 + ... + 1004678.

It is an arithmetic number, because the mean of its divisors is an integer number (30137520).

Almost surely, 2^190870865 is an apocalyptic number.

It is an amenable number.

190870865 is a deficient number, since it is larger than the sum of its proper divisors (50229295).

190870865 is a wasteful number, since it uses less digits than its factorization.

190870865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009191.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 190870865 is about 13815.6022308114. The cubic root of 190870865 is about 575.7667050094.

The spelling of 190870865 in words is "one hundred ninety million, eight hundred seventy thousand, eight hundred sixty-five".