16723138 has 8 divisors (see below), whose sum is σ = 26560332. Its totient is φ = 7869696.

The previous prime is 16723129. The next prime is 16723141. The reversal of 16723138 is 83132761.

It can be written as a sum of positive squares in 2 ways, for example, as 15737089 + 986049 = 3967^2 + 993^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245895 + ... + 245962.

Almost surely, 2^16723138 is an apocalyptic number.

16723138 is a deficient number, since it is larger than the sum of its proper divisors (9837194).

16723138 is a wasteful number, since it uses less digits than its factorization.

16723138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491876.

The product of its digits is 6048, while the sum is 31.

The square root of 16723138 is about 4089.3933535428. The cubic root of 16723138 is about 255.7246490098.

Adding to 16723138 its reverse (83132761), we get a palindrome (99855899).

It can be divided in two parts, 16723 and 138, that added together give a palindrome (16861).

The spelling of 16723138 in words is "sixteen million, seven hundred twenty-three thousand, one hundred thirty-eight".