423744691 has 4 divisors (see below), whose sum is σ = 423902584. Its totient is φ = 423586800.

The previous prime is 423744679. The next prime is 423744701. The reversal of 423744691 is 196447324.

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 423744691 - 2²¹ = 421647539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423742691) 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, 74850 + ... + 80311.

It is an arithmetic number, because the mean of its divisors is an integer number (105975646).

Almost surely, 2^423744691 is an apocalyptic number.

423744691 is a deficient number, since it is larger than the sum of its proper divisors (157893).

423744691 is a wasteful number, since it uses less digits than its factorization.

423744691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157892.

The product of its digits is 145152, while the sum is 40.

The square root of 423744691 is about 20585.0598978968. The cubic root of 423744691 is about 751.1063322731.

The spelling of 423744691 in words is "four hundred twenty-three million, seven hundred forty-four thousand, six hundred ninety-one".