16977994 has 12 divisors (see below), whose sum is σ = 27993042. Its totient is φ = 7717160.

The previous prime is 16977973. The next prime is 16977997. The reversal of 16977994 is 49977961.

It can be written as a sum of positive squares in only one way, i.e., 16297369 + 680625 = 4037^2 + 825^2 .

It is not an unprimeable number, because it can be changed into a prime (16977997) 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 5 ways as a sum of consecutive naturals, for example, 34837 + ... + 35320.

Almost surely, 2^16977994 is an apocalyptic number.

16977994 is a deficient number, since it is larger than the sum of its proper divisors (11015048).

16977994 is a wasteful number, since it uses less digits than its factorization.

16977994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70181 (or 70170 counting only the distinct ones).

The product of its digits is 857304, while the sum is 52.

The square root of 16977994 is about 4120.4361419636. The cubic root of 16977994 is about 257.0171628785.

It can be divided in two parts, 16977 and 994, that added together give a palindrome (17971).

The spelling of 16977994 in words is "sixteen million, nine hundred seventy-seven thousand, nine hundred ninety-four".