764368009 has 4 divisors (see below), whose sum is σ = 764495620. Its totient is φ = 764240400.

The previous prime is 764367983. The next prime is 764368013. The reversal of 764368009 is 900863467.

It is a happy number.

764368009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 637310025 + 127057984 = 25245^2 + 11272^2 .

It is a cyclic number.

It is not a de Polignac number, because 764368009 - 2²³ = 755979401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764368079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54354 + ... + 66955.

It is an arithmetic number, because the mean of its divisors is an integer number (191123905).

Almost surely, 2^764368009 is an apocalyptic number.

It is an amenable number.

764368009 is a deficient number, since it is larger than the sum of its proper divisors (127611).

764368009 is a wasteful number, since it uses less digits than its factorization.

764368009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127610.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 764368009 is about 27647.2061698827. The cubic root of 764368009 is about 914.3255040893.

The spelling of 764368009 in words is "seven hundred sixty-four million, three hundred sixty-eight thousand, nine".