190891265 has 16 divisors (see below), whose sum is σ = 233432976. Its totient is φ = 149817600.

The previous prime is 190891243. The next prime is 190891301. The reversal of 190891265 is 562198091.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 78446449 + 112444816 = 8857^2 + 10604^2 .

It is not a de Polignac number, because 190891265 - 2⁸ = 190891009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186455 + ... + 187475.

It is an arithmetic number, because the mean of its divisors is an integer number (14589561).

Almost surely, 2^190891265 is an apocalyptic number.

It is an amenable number.

190891265 is a deficient number, since it is larger than the sum of its proper divisors (42541711).

190891265 is a wasteful number, since it uses less digits than its factorization.

190891265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 190891265 is about 13816.3405068057. The cubic root of 190891265 is about 575.7872166476.

The spelling of 190891265 in words is "one hundred ninety million, eight hundred ninety-one thousand, two hundred sixty-five".