16858069 has 2 divisors, whose sum is σ = 16858070. Its totient is φ = 16858068.

The previous prime is 16858063. The next prime is 16858091. The reversal of 16858069 is 96085861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15563025 + 1295044 = 3945^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 16858069 - 2¹⁹ = 16333781 is a prime.

It is a super-2 number, since 2×16858069² = 568388980817522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16858063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8429034 + 8429035.

It is an arithmetic number, because the mean of its divisors is an integer number (8429035).

Almost surely, 2^16858069 is an apocalyptic number.

It is an amenable number.

16858069 is a deficient number, since it is larger than the sum of its proper divisors (1).

16858069 is an equidigital number, since it uses as much as digits as its factorization.

16858069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 16858069 is about 4105.8578884321. The cubic root of 16858069 is about 256.4105807698.

The spelling of 16858069 in words is "sixteen million, eight hundred fifty-eight thousand, sixty-nine".