16990213 has 2 divisors, whose sum is σ = 16990214. Its totient is φ = 16990212.

The previous prime is 16990177. The next prime is 16990217. The reversal of 16990213 is 31209961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 1292769 = 3962^2 + 1137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16990213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16990217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8495106 + 8495107.

It is an arithmetic number, because the mean of its divisors is an integer number (8495107).

Almost surely, 2^16990213 is an apocalyptic number.

It is an amenable number.

16990213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16990213 is an equidigital number, since it uses as much as digits as its factorization.

16990213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 16990213 is about 4121.9186066685. The cubic root of 16990213 is about 257.0788061958.

The spelling of 16990213 in words is "sixteen million, nine hundred ninety thousand, two hundred thirteen".