765100090 has 12 divisors (see below), whose sum is σ = 1377337626. Its totient is φ = 306005048.

The previous prime is 765100073. The next prime is 765100099. The reversal of 765100090 is 90001567.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 688590081 + 76510009 = 26241^2 + 8747^2 .

It is not an unprimeable number, because it can be changed into a prime (765100099) 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 5 ways as a sum of consecutive naturals, for example, 83097 + ... + 91843.

Almost surely, 2^765100090 is an apocalyptic number.

765100090 is a deficient number, since it is larger than the sum of its proper divisors (612237536).

765100090 is an frugal number, since it uses more digits than its factorization.

765100090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17501 (or 8754 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 765100090 is about 27660.4426934928. The cubic root of 765100090 is about 914.6173123717.

The spelling of 765100090 in words is "seven hundred sixty-five million, one hundred thousand, ninety".