16509087 has 12 divisors (see below), whose sum is σ = 27253200. Its totient is φ = 9433728.

The previous prime is 16509083. The next prime is 16509089. The reversal of 16509087 is 78090561.

It is not a de Polignac number, because 16509087 - 2² = 16509083 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16509083) 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 11 ways as a sum of consecutive naturals, for example, 130962 + ... + 131087.

It is an arithmetic number, because the mean of its divisors is an integer number (2271100).

Almost surely, 2^16509087 is an apocalyptic number.

16509087 is a deficient number, since it is larger than the sum of its proper divisors (10744113).

16509087 is a wasteful number, since it uses less digits than its factorization.

16509087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262062 (or 262059 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 16509087 is about 4063.1375807373. The cubic root of 16509087 is about 254.6288950206.

The spelling of 16509087 in words is "sixteen million, five hundred nine thousand, eighty-seven".