423694217 has 4 divisors (see below), whose sum is σ = 426928656. Its totient is φ = 420459780.

The previous prime is 423694207. The next prime is 423694223. The reversal of 423694217 is 712496324.

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.

It is a cyclic number.

It is not a de Polignac number, because 423694217 - 2⁸ = 423693961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423694207) 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, 1617023 + ... + 1617284.

It is an arithmetic number, because the mean of its divisors is an integer number (106732164).

Almost surely, 2^423694217 is an apocalyptic number.

It is an amenable number.

423694217 is a deficient number, since it is larger than the sum of its proper divisors (3234439).

423694217 is a wasteful number, since it uses less digits than its factorization.

423694217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234438.

The product of its digits is 72576, while the sum is 38.

The square root of 423694217 is about 20583.8338751555. The cubic root of 423694217 is about 751.0765086182.

The spelling of 423694217 in words is "four hundred twenty-three million, six hundred ninety-four thousand, two hundred seventeen".