764920905 has 32 divisors (see below), whose sum is σ = 1472332800. Its totient is φ = 331273152.

The previous prime is 764920889. The next prime is 764920909. The reversal of 764920905 is 509029467.

764920905 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 764920905 - 2⁴ = 764920889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (764920909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189715 + ... + 193704.

It is an arithmetic number, because the mean of its divisors is an integer number (46010400).

Almost surely, 2^764920905 is an apocalyptic number.

It is an amenable number.

764920905 is a deficient number, since it is larger than the sum of its proper divisors (707411895).

764920905 is a wasteful number, since it uses less digits than its factorization.

764920905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383453.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 764920905 is about 27657.2034920380. The cubic root of 764920905 is about 914.5459062464.

The spelling of 764920905 in words is "seven hundred sixty-four million, nine hundred twenty thousand, nine hundred five".