16860749 has 2 divisors, whose sum is σ = 16860750. Its totient is φ = 16860748.

The previous prime is 16860743. The next prime is 16860757. The reversal of 16860749 is 94706861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 198025 = 4082^2 + 445^2 .

It is an emirp because it is prime and its reverse (94706861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16860749 - 2¹⁶ = 16795213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16860743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430374 + 8430375.

It is an arithmetic number, because the mean of its divisors is an integer number (8430375).

Almost surely, 2^16860749 is an apocalyptic number.

It is an amenable number.

16860749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16860749 is an equidigital number, since it uses as much as digits as its factorization.

16860749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16860749 is about 4106.1842384384. The cubic root of 16860749 is about 256.4241676154.

The spelling of 16860749 in words is "sixteen million, eight hundred sixty thousand, seven hundred forty-nine".