16899973 has 2 divisors, whose sum is σ = 16899974. Its totient is φ = 16899972.

The previous prime is 16899959. The next prime is 16900021. The reversal of 16899973 is 37999861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14730244 + 2169729 = 3838^2 + 1473^2 .

It is an emirp because it is prime and its reverse (37999861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16899973 - 2¹³ = 16891781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16899973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16899073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8449986 + 8449987.

It is an arithmetic number, because the mean of its divisors is an integer number (8449987).

Almost surely, 2^16899973 is an apocalyptic number.

It is an amenable number.

16899973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16899973 is an equidigital number, since it uses as much as digits as its factorization.

16899973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 16899973 is about 4110.9576743139. The cubic root of 16899973 is about 256.6228577241.

It can be divided in two parts, 1689997 and 3, that added together give a square (1690000 = 1300²).

The spelling of 16899973 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred seventy-three".