16844977 has 4 divisors (see below), whose sum is σ = 17835876. Its totient is φ = 15854080.

The previous prime is 16844957. The next prime is 16844981. The reversal of 16844977 is 77944861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77944861 = 23 ⋅3388907.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 9790641 = 2656^2 + 3129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16844977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16844917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495424 + ... + 495457.

It is an arithmetic number, because the mean of its divisors is an integer number (4458969).

Almost surely, 2^16844977 is an apocalyptic number.

16844977 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16844977 is a deficient number, since it is larger than the sum of its proper divisors (990899).

16844977 is an equidigital number, since it uses as much as digits as its factorization.

16844977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990898.

The product of its digits is 338688, while the sum is 46.

The square root of 16844977 is about 4104.2632712827. The cubic root of 16844977 is about 256.3441873076.

The spelling of 16844977 in words is "sixteen million, eight hundred forty-four thousand, nine hundred seventy-seven".