16850861 has 2 divisors, whose sum is σ = 16850862. Its totient is φ = 16850860.

The previous prime is 16850843. The next prime is 16850917. The reversal of 16850861 is 16805861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 609961 = 4030^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 16850861 - 2¹⁸ = 16588717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16853861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8425430 + 8425431.

It is an arithmetic number, because the mean of its divisors is an integer number (8425431).

Almost surely, 2^16850861 is an apocalyptic number.

It is an amenable number.

16850861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16850861 is an equidigital number, since it uses as much as digits as its factorization.

16850861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 16850861 is about 4104.9800243119. The cubic root of 16850861 is about 256.3740310925.

The spelling of 16850861 in words is "sixteen million, eight hundred fifty thousand, eight hundred sixty-one".