1423020403 has 4 divisors (see below), whose sum is σ = 1626309040. Its totient is φ = 1219731768.

The previous prime is 1423020359. The next prime is 1423020421. The reversal of 1423020403 is 3040203241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040203241 = 16699 ⋅182059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423020403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423020493) 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, 101644308 + ... + 101644321.

It is an arithmetic number, because the mean of its divisors is an integer number (406577260).

Almost surely, 2^1423020403 is an apocalyptic number.

1423020403 is a deficient number, since it is larger than the sum of its proper divisors (203288637).

1423020403 is an equidigital number, since it uses as much as digits as its factorization.

1423020403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203288636.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1423020403 is about 37722.9426609325. The cubic root of 1423020403 is about 1124.7872263940.

Adding to 1423020403 its reverse (3040203241), we get a palindrome (4463223644).

The spelling of 1423020403 in words is "one billion, four hundred twenty-three million, twenty thousand, four hundred three".