990195765 has 32 divisors (see below), whose sum is σ = 1742501376. Its totient is φ = 477104640.

The previous prime is 990195763. The next prime is 990195779. The reversal of 990195765 is 567591099.

It is a happy number.

It is not a de Polignac number, because 990195765 - 2¹ = 990195763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990195763) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 44856 + ... + 63185.

It is an arithmetic number, because the mean of its divisors is an integer number (54453168).

Almost surely, 2^990195765 is an apocalyptic number.

It is an amenable number.

990195765 is a deficient number, since it is larger than the sum of its proper divisors (752305611).

990195765 is a wasteful number, since it uses less digits than its factorization.

990195765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108109.

The product of its (nonzero) digits is 765450, while the sum is 51.

The square root of 990195765 is about 31467.3762013931. The cubic root of 990195765 is about 996.7211827741.

The spelling of 990195765 in words is "nine hundred ninety million, one hundred ninety-five thousand, seven hundred sixty-five".