402023423 has 4 divisors (see below), whose sum is σ = 402130128. Its totient is φ = 401916720.

The previous prime is 402023393. The next prime is 402023449. The reversal of 402023423 is 324320204.

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 402023423 - 2⁶ = 402023359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402023395 and 402023404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402023473) 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, 47486 + ... + 55307.

It is an arithmetic number, because the mean of its divisors is an integer number (100532532).

Almost surely, 2^402023423 is an apocalyptic number.

402023423 is a deficient number, since it is larger than the sum of its proper divisors (106705).

402023423 is a wasteful number, since it uses less digits than its factorization.

402023423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106704.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 402023423 is about 20050.5217637846. The cubic root of 402023423 is about 738.0466030358.

Adding to 402023423 its reverse (324320204), we get a palindrome (726343627).

The spelling of 402023423 in words is "four hundred two million, twenty-three thousand, four hundred twenty-three".