765213947 has 8 divisors (see below), whose sum is σ = 780173856. Its totient is φ = 750273472.

The previous prime is 765213937. The next prime is 765213973. The reversal of 765213947 is 749312567.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 765213947 - 2²⁰ = 764165371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 765213898 and 765213907.

It is not an unprimeable number, because it can be changed into a prime (765213937) 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 7 ways as a sum of consecutive naturals, for example, 93983 + ... + 101799.

It is an arithmetic number, because the mean of its divisors is an integer number (97521732).

Almost surely, 2^765213947 is an apocalyptic number.

765213947 is a deficient number, since it is larger than the sum of its proper divisors (14959909).

765213947 is a wasteful number, since it uses less digits than its factorization.

765213947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717.

The product of its digits is 317520, while the sum is 44.

The square root of 765213947 is about 27662.5007365567. The cubic root of 765213947 is about 914.6626791673.

The spelling of 765213947 in words is "seven hundred sixty-five million, two hundred thirteen thousand, nine hundred forty-seven".