190857965 has 4 divisors (see below), whose sum is σ = 229029564. Its totient is φ = 152686368.

The previous prime is 190857943. The next prime is 190858007. The reversal of 190857965 is 569758091.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73222249 + 117635716 = 8557^2 + 10846^2 .

It is a cyclic number.

It is not a de Polignac number, because 190857965 - 2¹² = 190853869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 19085792 + ... + 19085801.

It is an arithmetic number, because the mean of its divisors is an integer number (57257391).

Almost surely, 2^190857965 is an apocalyptic number.

It is an amenable number.

190857965 is a deficient number, since it is larger than the sum of its proper divisors (38171599).

190857965 is an equidigital number, since it uses as much as digits as its factorization.

190857965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38171598.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 190857965 is about 13815.1353594527. The cubic root of 190857965 is about 575.7537336604.

The spelling of 190857965 in words is "one hundred ninety million, eight hundred fifty-seven thousand, nine hundred sixty-five".