16887413 has 2 divisors, whose sum is σ = 16887414. Its totient is φ = 16887412.

The previous prime is 16887389. The next prime is 16887419. The reversal of 16887413 is 31478861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16826404 + 61009 = 4102^2 + 247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16887413 is a prime.

It is a super-3 number, since 3×16887413³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16887419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8443706 + 8443707.

It is an arithmetic number, because the mean of its divisors is an integer number (8443707).

Almost surely, 2^16887413 is an apocalyptic number.

It is an amenable number.

16887413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16887413 is an equidigital number, since it uses as much as digits as its factorization.

16887413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 16887413 is about 4109.4297657948. The cubic root of 16887413 is about 256.5592682358.

The spelling of 16887413 in words is "sixteen million, eight hundred eighty-seven thousand, four hundred thirteen".