16612861 has 4 divisors (see below), whose sum is σ = 16699132. Its totient is φ = 16526592.

The previous prime is 16612847. The next prime is 16612867. The reversal of 16612861 is 16821661.

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 4813636 + 11799225 = 2194^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 16612861 - 2⁷ = 16612733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16612867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42846 + ... + 43231.

It is an arithmetic number, because the mean of its divisors is an integer number (4174783).

Almost surely, 2^16612861 is an apocalyptic number.

It is an amenable number.

16612861 is a deficient number, since it is larger than the sum of its proper divisors (86271).

16612861 is an equidigital number, since it uses as much as digits as its factorization.

16612861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86270.

The product of its digits is 3456, while the sum is 31.

The square root of 16612861 is about 4075.8877560600. The cubic root of 16612861 is about 255.1613025331.

The spelling of 16612861 in words is "sixteen million, six hundred twelve thousand, eight hundred sixty-one".