764642233 has 4 divisors (see below), whose sum is σ = 772066048. Its totient is φ = 757218420.

The previous prime is 764642161. The next prime is 764642237. The reversal of 764642233 is 332246467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332246467 = 7 ⋅47463781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764642233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 764642192 and 764642201.

It is not an unprimeable number, because it can be changed into a prime (764642237) 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, 3711753 + ... + 3711958.

It is an arithmetic number, because the mean of its divisors is an integer number (193016512).

Almost surely, 2^764642233 is an apocalyptic number.

It is an amenable number.

764642233 is a deficient number, since it is larger than the sum of its proper divisors (7423815).

764642233 is a wasteful number, since it uses less digits than its factorization.

764642233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7423814.

The product of its digits is 145152, while the sum is 37.

The square root of 764642233 is about 27652.1650689417. The cubic root of 764642233 is about 914.4348318896.

The spelling of 764642233 in words is "seven hundred sixty-four million, six hundred forty-two thousand, two hundred thirty-three".