16731005 has 8 divisors (see below), whose sum is σ = 20950272. Its totient is φ = 12802768.

The previous prime is 16730983. The next prime is 16731007. The reversal of 16731005 is 50013761.

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 16731005 - 2¹² = 16726909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16731007) 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, 72629 + ... + 72858.

It is an arithmetic number, because the mean of its divisors is an integer number (2618784).

Almost surely, 2^16731005 is an apocalyptic number.

It is an amenable number.

16731005 is a deficient number, since it is larger than the sum of its proper divisors (4219267).

16731005 is a wasteful number, since it uses less digits than its factorization.

16731005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145515.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 16731005 is about 4090.3551190575. The cubic root of 16731005 is about 255.7647425702.

Adding to 16731005 its reverse (50013761), we get a palindrome (66744766).

The spelling of 16731005 in words is "sixteen million, seven hundred thirty-one thousand, five".