764218947 has 16 divisors (see below), whose sum is σ = 1032514560. Its totient is φ = 502740000.

The previous prime is 764218943. The next prime is 764219021. The reversal of 764218947 is 749812467.

It is not a de Polignac number, because 764218947 - 2² = 764218943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 764218896 and 764218905.

It is not an unprimeable number, because it can be changed into a prime (764218943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77422 + ... + 86732.

It is an arithmetic number, because the mean of its divisors is an integer number (64532160).

Almost surely, 2^764218947 is an apocalyptic number.

764218947 is a deficient number, since it is larger than the sum of its proper divisors (268295613).

764218947 is a wasteful number, since it uses less digits than its factorization.

764218947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674.

The product of its digits is 677376, while the sum is 48.

The square root of 764218947 is about 27644.5102506809. The cubic root of 764218947 is about 914.2660649853.

The spelling of 764218947 in words is "seven hundred sixty-four million, two hundred eighteen thousand, nine hundred forty-seven".