423165839 has 4 divisors (see below), whose sum is σ = 423556224. Its totient is φ = 422775456.

The previous prime is 423165823. The next prime is 423165851. The reversal of 423165839 is 938561324.

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 423165839 - 2⁴ = 423165823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423165796 and 423165805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423165859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193562 + ... + 195735.

It is an arithmetic number, because the mean of its divisors is an integer number (105889056).

Almost surely, 2^423165839 is an apocalyptic number.

423165839 is a deficient number, since it is larger than the sum of its proper divisors (390385).

423165839 is a wasteful number, since it uses less digits than its factorization.

423165839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390384.

The product of its digits is 155520, while the sum is 41.

The square root of 423165839 is about 20570.9950901749. The cubic root of 423165839 is about 750.7641627722.

The spelling of 423165839 in words is "four hundred twenty-three million, one hundred sixty-five thousand, eight hundred thirty-nine".