16768945 has 4 divisors (see below), whose sum is σ = 20122740. Its totient is φ = 13415152.

The previous prime is 16768901. The next prime is 16768967. The reversal of 16768945 is 54986761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8520561 + 8248384 = 2919^2 + 2872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16768945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16768895 and 16768904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676890 + ... + 1676899.

It is an arithmetic number, because the mean of its divisors is an integer number (5030685).

Almost surely, 2^16768945 is an apocalyptic number.

It is an amenable number.

16768945 is a deficient number, since it is larger than the sum of its proper divisors (3353795).

16768945 is an equidigital number, since it uses as much as digits as its factorization.

16768945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353794.

The product of its digits is 362880, while the sum is 46.

The square root of 16768945 is about 4094.9902319786. The cubic root of 16768945 is about 255.9579246035.

The spelling of 16768945 in words is "sixteen million, seven hundred sixty-eight thousand, nine hundred forty-five".