16906641 has 4 divisors (see below), whose sum is σ = 22542192. Its totient is φ = 11271092.

The previous prime is 16906639. The next prime is 16906649. The reversal of 16906641 is 14660961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16906641 - 2¹ = 16906639 is a prime.

It is a super-3 number, since 3×16906641³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16906649) 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 3 ways as a sum of consecutive naturals, for example, 2817771 + ... + 2817776.

It is an arithmetic number, because the mean of its divisors is an integer number (5635548).

Almost surely, 2^16906641 is an apocalyptic number.

It is an amenable number.

16906641 is a deficient number, since it is larger than the sum of its proper divisors (5635551).

16906641 is an equidigital number, since it uses as much as digits as its factorization.

16906641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635550.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 16906641 is about 4111.7685975745. The cubic root of 16906641 is about 256.6566040544.

The spelling of 16906641 in words is "sixteen million, nine hundred six thousand, six hundred forty-one".