16587913 has 8 divisors (see below), whose sum is σ = 17443080. Its totient is φ = 15751680.

The previous prime is 16587881. The next prime is 16587917. The reversal of 16587913 is 31978561.

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 16345849 = 492^2 + 4043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16587913 - 2⁵ = 16587881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16587917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (2180385).

Almost surely, 2^16587913 is an apocalyptic number.

It is an amenable number.

16587913 is a deficient number, since it is larger than the sum of its proper divisors (855167).

16587913 is an equidigital number, since it uses as much as digits as its factorization.

16587913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9467.

The product of its digits is 45360, while the sum is 40.

The square root of 16587913 is about 4072.8261686451. The cubic root of 16587913 is about 255.0335109106.

The spelling of 16587913 in words is "sixteen million, five hundred eighty-seven thousand, nine hundred thirteen".