16587091 has 4 divisors (see below), whose sum is σ = 16820784. Its totient is φ = 16353400.

The previous prime is 16587079. The next prime is 16587107. The reversal of 16587091 is 19078561.

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-16587091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16587091.

It is not an unprimeable number, because it can be changed into a prime (16587041) 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, 116740 + ... + 116881.

It is an arithmetic number, because the mean of its divisors is an integer number (4205196).

Almost surely, 2^16587091 is an apocalyptic number.

16587091 is a deficient number, since it is larger than the sum of its proper divisors (233693).

16587091 is an equidigital number, since it uses as much as digits as its factorization.

16587091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233692.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 16587091 is about 4072.7252546667. The cubic root of 16587091 is about 255.0292981843.

The spelling of 16587091 in words is "sixteen million, five hundred eighty-seven thousand, ninety-one".