16723613 has 4 divisors (see below), whose sum is σ = 17131548. Its totient is φ = 16315680.

The previous prime is 16723607. The next prime is 16723621. The reversal of 16723613 is 31632761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31632761 = 3217 ⋅9833.

It can be written as a sum of positive squares in 2 ways, for example, as 3452164 + 13271449 = 1858^2 + 3643^2 .

It is a cyclic number.

It is not a de Polignac number, because 16723613 - 2⁶ = 16723549 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 (16723813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203906 + ... + 203987.

It is an arithmetic number, because the mean of its divisors is an integer number (4282887).

Almost surely, 2^16723613 is an apocalyptic number.

It is an amenable number.

16723613 is a deficient number, since it is larger than the sum of its proper divisors (407935).

16723613 is an equidigital number, since it uses as much as digits as its factorization.

16723613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407934.

The product of its digits is 4536, while the sum is 29.

The square root of 16723613 is about 4089.4514302043. The cubic root of 16723613 is about 255.7270701674.

The spelling of 16723613 in words is "sixteen million, seven hundred twenty-three thousand, six hundred thirteen".