16920859 has 2 divisors, whose sum is σ = 16920860. Its totient is φ = 16920858.

The previous prime is 16920821. The next prime is 16920901. The reversal of 16920859 is 95802961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16920859 - 2⁷ = 16920731 is a prime.

It is a super-4 number, since 4×16920859⁴ (a number of 30 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16920259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8460429 + 8460430.

It is an arithmetic number, because the mean of its divisors is an integer number (8460430).

Almost surely, 2^16920859 is an apocalyptic number.

16920859 is a deficient number, since it is larger than the sum of its proper divisors (1).

16920859 is an equidigital number, since it uses as much as digits as its factorization.

16920859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 16920859 is about 4113.4971739385. The cubic root of 16920859 is about 256.7285308421.

The spelling of 16920859 in words is "sixteen million, nine hundred twenty thousand, eight hundred fifty-nine".