764391693 has 16 divisors (see below), whose sum is σ = 1123115840. Its totient is φ = 459454464.

The previous prime is 764391647. The next prime is 764391743. The reversal of 764391693 is 396193467.

It is not a de Polignac number, because 764391693 - 2¹⁴ = 764375309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764391643) 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, 226228 + ... + 229581.

It is an arithmetic number, because the mean of its divisors is an integer number (70194740).

Almost surely, 2^764391693 is an apocalyptic number.

It is an amenable number.

764391693 is a deficient number, since it is larger than the sum of its proper divisors (358724147).

764391693 is a wasteful number, since it uses less digits than its factorization.

764391693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455868.

The product of its digits is 734832, while the sum is 48.

The square root of 764391693 is about 27647.6344919416. The cubic root of 764391693 is about 914.3349474732.

The spelling of 764391693 in words is "seven hundred sixty-four million, three hundred ninety-one thousand, six hundred ninety-three".