16868653 has 2 divisors, whose sum is σ = 16868654. Its totient is φ = 16868652.

The previous prime is 16868639. The next prime is 16868669. The reversal of 16868653 is 35686861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11546404 + 5322249 = 3398^2 + 2307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16868653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16868603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8434326 + 8434327.

It is an arithmetic number, because the mean of its divisors is an integer number (8434327).

Almost surely, 2^16868653 is an apocalyptic number.

It is an amenable number.

16868653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868653 is an equidigital number, since it uses as much as digits as its factorization.

16868653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 16868653 is about 4107.1465763958. The cubic root of 16868653 is about 256.4642302880.

The spelling of 16868653 in words is "sixteen million, eight hundred sixty-eight thousand, six hundred fifty-three".