403402423 has 4 divisors (see below), whose sum is σ = 403820560. Its totient is φ = 402984288.

The previous prime is 403402409. The next prime is 403402459. The reversal of 403402423 is 324204304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403402423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403402394 and 403402403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403402523) 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, 207618 + ... + 209551.

It is an arithmetic number, because the mean of its divisors is an integer number (100955140).

Almost surely, 2^403402423 is an apocalyptic number.

403402423 is a deficient number, since it is larger than the sum of its proper divisors (418137).

403402423 is an equidigital number, since it uses as much as digits as its factorization.

403402423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418136.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 403402423 is about 20084.8804576975. The cubic root of 403402423 is about 738.8895097949.

Adding to 403402423 its reverse (324204304), we get a palindrome (727606727).

The spelling of 403402423 in words is "four hundred three million, four hundred two thousand, four hundred twenty-three".