16730891 has 4 divisors (see below), whose sum is σ = 16932552. Its totient is φ = 16529232.

The previous prime is 16730863. The next prime is 16730899. The reversal of 16730891 is 19803761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16730891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16730899) 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, 100706 + ... + 100871.

It is an arithmetic number, because the mean of its divisors is an integer number (4233138).

Almost surely, 2^16730891 is an apocalyptic number.

16730891 is a deficient number, since it is larger than the sum of its proper divisors (201661).

16730891 is an equidigital number, since it uses as much as digits as its factorization.

16730891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201660.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 16730891 is about 4090.3411838134. The cubic root of 16730891 is about 255.7641616678.

The spelling of 16730891 in words is "sixteen million, seven hundred thirty thousand, eight hundred ninety-one".