16431623 has 8 divisors (see below), whose sum is σ = 18072768. Its totient is φ = 14844384.

The previous prime is 16431617. The next prime is 16431659. The reversal of 16431623 is 32613461.

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

It is a cyclic number.

It is not a de Polignac number, because 16431623 - 2¹² = 16427527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16431592 and 16431601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16433623) 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, 12836 + ... + 14057.

It is an arithmetic number, because the mean of its divisors is an integer number (2259096).

Almost surely, 2^16431623 is an apocalyptic number.

16431623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16431623 is a deficient number, since it is larger than the sum of its proper divisors (1641145).

16431623 is a wasteful number, since it uses less digits than its factorization.

16431623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26953.

The product of its digits is 2592, while the sum is 26.

The square root of 16431623 is about 4053.5938375718. The cubic root of 16431623 is about 254.2300136052.

The spelling of 16431623 in words is "sixteen million, four hundred thirty-one thousand, six hundred twenty-three".