16667213 has 4 divisors (see below), whose sum is σ = 16940508. Its totient is φ = 16393920.

The previous prime is 16667173. The next prime is 16667263. The reversal of 16667213 is 31276661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 16024009 = 802^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 16667213 - 2⁶ = 16667149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16667213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136556 + ... + 136677.

It is an arithmetic number, because the mean of its divisors is an integer number (4235127).

Almost surely, 2^16667213 is an apocalyptic number.

It is an amenable number.

16667213 is a deficient number, since it is larger than the sum of its proper divisors (273295).

16667213 is an equidigital number, since it uses as much as digits as its factorization.

16667213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273294.

The product of its digits is 9072, while the sum is 32.

The square root of 16667213 is about 4082.5498159851. The cubic root of 16667213 is about 255.4392685033.

The spelling of 16667213 in words is "sixteen million, six hundred sixty-seven thousand, two hundred thirteen".