764549989 has 12 divisors (see below), whose sum is σ = 897692544. Its totient is φ = 649199544.

The previous prime is 764549983. The next prime is 764549999. The reversal of 764549989 is 989945467.

764549989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 764549989 - 2⁵ = 764549957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764549983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67669 + ... + 78154.

It is an arithmetic number, because the mean of its divisors is an integer number (74807712).

Almost surely, 2^764549989 is an apocalyptic number.

It is an amenable number.

764549989 is a deficient number, since it is larger than the sum of its proper divisors (133142555).

764549989 is a wasteful number, since it uses less digits than its factorization.

764549989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145944 (or 145937 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The square root of 764549989 is about 27650.4970841394. The cubic root of 764549989 is about 914.3980589104.

The spelling of 764549989 in words is "seven hundred sixty-four million, five hundred forty-nine thousand, nine hundred eighty-nine".