765999099 has 10 divisors (see below), whose sum is σ = 1144270380. Its totient is φ = 510666012.

The previous prime is 765999071. The next prime is 765999131. The reversal of 765999099 is 990999567.

It is not a de Polignac number, because 765999099 - 2¹² = 765995003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (765999019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4728309 + ... + 4728470.

It is an arithmetic number, because the mean of its divisors is an integer number (114427038).

Almost surely, 2^765999099 is an apocalyptic number.

765999099 is a deficient number, since it is larger than the sum of its proper divisors (378271281).

765999099 is an equidigital number, since it uses as much as digits as its factorization.

765999099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9456791 (or 9456782 counting only the distinct ones).

The product of its (nonzero) digits is 12400290, while the sum is 63.

The square root of 765999099 is about 27676.6887289647. The cubic root of 765999099 is about 914.9754038000.

It can be divided in two parts, 7659 and 99099, that multiplied together give a triangular number (758999241 = T₃₈₉₆₁).

The spelling of 765999099 in words is "seven hundred sixty-five million, nine hundred ninety-nine thousand, ninety-nine".