923668691 has 4 divisors (see below), whose sum is σ = 1007638584. Its totient is φ = 839698800.

The previous prime is 923668687. The next prime is 923668699. The reversal of 923668691 is 196866329.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 923668691 - 2² = 923668687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (923668699) 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, 41984930 + ... + 41984951.

It is an arithmetic number, because the mean of its divisors is an integer number (251909646).

Almost surely, 2^923668691 is an apocalyptic number.

923668691 is a deficient number, since it is larger than the sum of its proper divisors (83969893).

923668691 is a wasteful number, since it uses less digits than its factorization.

923668691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83969892.

The product of its digits is 839808, while the sum is 50.

The square root of 923668691 is about 30391.9181855966. The cubic root of 923668691 is about 973.8799115339.

The spelling of 923668691 in words is "nine hundred twenty-three million, six hundred sixty-eight thousand, six hundred ninety-one".