87643413 has 24 divisors (see below), whose sum is σ = 148730400. Its totient is φ = 49030560.

The previous prime is 87643411. The next prime is 87643429. The reversal of 87643413 is 31434678.

87643413 is a `hidden beast` number, since 8 + 7 + 643 + 4 + 1 + 3 = 666.

It is not a de Polignac number, because 87643413 - 2¹ = 87643411 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87643411) 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 23 ways as a sum of consecutive naturals, for example, 32763 + ... + 35336.

It is an arithmetic number, because the mean of its divisors is an integer number (6197100).

Almost surely, 2^87643413 is an apocalyptic number.

It is an amenable number.

87643413 is a deficient number, since it is larger than the sum of its proper divisors (61086987).

87643413 is a wasteful number, since it uses less digits than its factorization.

87643413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68129 (or 68126 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 87643413 is about 9361.8060757527. The cubic root of 87643413 is about 444.1944151022.

The spelling of 87643413 in words is "eighty-seven million, six hundred forty-three thousand, four hundred thirteen".