16891417 has 4 divisors (see below), whose sum is σ = 16901136. Its totient is φ = 16881700.

The previous prime is 16891411. The next prime is 16891423. The reversal of 16891417 is 71419861.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (16891411) and next prime (16891423).

It is a cyclic number.

It is not a de Polignac number, because 16891417 - 2¹⁵ = 16858649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16891411) 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, 1459 + ... + 5992.

It is an arithmetic number, because the mean of its divisors is an integer number (4225284).

Almost surely, 2^16891417 is an apocalyptic number.

It is an amenable number.

16891417 is a deficient number, since it is larger than the sum of its proper divisors (9719).

16891417 is an equidigital number, since it uses as much as digits as its factorization.

16891417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9718.

The product of its digits is 12096, while the sum is 37.

The square root of 16891417 is about 4109.9169091358. The cubic root of 16891417 is about 256.5795433391.

The spelling of 16891417 in words is "sixteen million, eight hundred ninety-one thousand, four hundred seventeen".