15663423 has 8 divisors (see below), whose sum is σ = 20947888. Its totient is φ = 10410624.

The previous prime is 15663421. The next prime is 15663433. The reversal of 15663423 is 32436651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15663423 - 2¹ = 15663421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15663421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6736 + ... + 8757.

It is an arithmetic number, because the mean of its divisors is an integer number (2618486).

Almost surely, 2^15663423 is an apocalyptic number.

15663423 is a deficient number, since it is larger than the sum of its proper divisors (5284465).

15663423 is a wasteful number, since it uses less digits than its factorization.

15663423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15833.

The product of its digits is 12960, while the sum is 30.

The square root of 15663423 is about 3957.7042587844. The cubic root of 15663423 is about 250.2047549226.

The spelling of 15663423 in words is "fifteen million, six hundred sixty-three thousand, four hundred twenty-three".