402112423 has 2 divisors, whose sum is σ = 402112424. Its totient is φ = 402112422.

The previous prime is 402112391. The next prime is 402112457. The reversal of 402112423 is 324211204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402112423 - 2⁵ = 402112391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402112423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402112483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201056211 + 201056212.

It is an arithmetic number, because the mean of its divisors is an integer number (201056212).

Almost surely, 2^402112423 is an apocalyptic number.

402112423 is a deficient number, since it is larger than the sum of its proper divisors (1).

402112423 is an equidigital number, since it uses as much as digits as its factorization.

402112423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402112423 is about 20052.7410345818. The cubic root of 402112423 is about 738.1010619697.

Adding to 402112423 its reverse (324211204), we get a palindrome (726323627).

The spelling of 402112423 in words is "four hundred two million, one hundred twelve thousand, four hundred twenty-three".