16486993 has 8 divisors (see below), whose sum is σ = 17234280. Its totient is φ = 15751680.

The previous prime is 16486979. The next prime is 16486997. The reversal of 16486993 is 39968461.

It can be written as a sum of positive squares in 4 ways, for example, as 1993744 + 14493249 = 1412^2 + 3807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16486993 - 2²¹ = 14389841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16486997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (2154285).

Almost surely, 2^16486993 is an apocalyptic number.

It is an amenable number.

16486993 is a deficient number, since it is larger than the sum of its proper divisors (747287).

16486993 is an equidigital number, since it uses as much as digits as its factorization.

16486993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5987.

The product of its digits is 279936, while the sum is 46.

The square root of 16486993 is about 4060.4178356420. The cubic root of 16486993 is about 254.5152549322.

The spelling of 16486993 in words is "sixteen million, four hundred eighty-six thousand, nine hundred ninety-three".