16977861 has 12 divisors (see below), whose sum is σ = 24986988. Its totient is φ = 11104704.

The previous prime is 16977859. The next prime is 16977871. The reversal of 16977861 is 16877961.

It can be written as a sum of positive squares in 2 ways, for example, as 5788836 + 11189025 = 2406^2 + 3345^2 .

It is not a de Polignac number, because 16977861 - 2¹ = 16977859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16977871) 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 11 ways as a sum of consecutive naturals, for example, 17320 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (2082249).

Almost surely, 2^16977861 is an apocalyptic number.

It is an amenable number.

16977861 is a deficient number, since it is larger than the sum of its proper divisors (8009127).

16977861 is a wasteful number, since it uses less digits than its factorization.

16977861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35652 (or 35649 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 16977861 is about 4120.4200028638. The cubic root of 16977861 is about 257.0164917475.

The spelling of 16977861 in words is "sixteen million, nine hundred seventy-seven thousand, eight hundred sixty-one".