16977145 has 8 divisors (see below), whose sum is σ = 20395656. Its totient is φ = 13566336.

The previous prime is 16977143. The next prime is 16977161. The reversal of 16977145 is 54177961.

It can be written as a sum of positive squares in 4 ways, for example, as 8543929 + 8433216 = 2923^2 + 2904^2 .

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 16977145 - 2¹ = 16977143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16977098 and 16977107.

It is not an unprimeable number, because it can be changed into a prime (16977143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5629 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (2549457).

Almost surely, 2^16977145 is an apocalyptic number.

It is an amenable number.

16977145 is a deficient number, since it is larger than the sum of its proper divisors (3418511).

16977145 is a wasteful number, since it uses less digits than its factorization.

16977145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851.

The product of its digits is 52920, while the sum is 40.

The square root of 16977145 is about 4120.3331176011. Note that the first 3 decimals coincide. The cubic root of 16977145 is about 257.0128786816.

The spelling of 16977145 in words is "sixteen million, nine hundred seventy-seven thousand, one hundred forty-five".