16087917 has 4 divisors (see below), whose sum is σ = 21450560. Its totient is φ = 10725276.

The previous prime is 16087913. The next prime is 16087921. The reversal of 16087917 is 71978061.

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 an interprime number because it is at equal distance from previous prime (16087913) and next prime (16087921).

It is not a de Polignac number, because 16087917 - 2² = 16087913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16087913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681317 + ... + 2681322.

It is an arithmetic number, because the mean of its divisors is an integer number (5362640).

Almost surely, 2^16087917 is an apocalyptic number.

It is an amenable number.

16087917 is a deficient number, since it is larger than the sum of its proper divisors (5362643).

16087917 is an equidigital number, since it uses as much as digits as its factorization.

16087917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362642.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 16087917 is about 4010.9745698521. The cubic root of 16087917 is about 252.4449025290. Note that the first 3 decimals are identical.

The spelling of 16087917 in words is "sixteen million, eighty-seven thousand, nine hundred seventeen".