87983813 has 8 divisors (see below), whose sum is σ = 92701920. Its totient is φ = 83274480.

The previous prime is 87983807. The next prime is 87983849. The reversal of 87983813 is 31838978.

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 87983813 - 2¹⁰ = 87982789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87983893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33131 + ... + 35687.

It is an arithmetic number, because the mean of its divisors is an integer number (11587740).

Almost surely, 2^87983813 is an apocalyptic number.

It is an amenable number.

87983813 is a deficient number, since it is larger than the sum of its proper divisors (4718107).

87983813 is a wasteful number, since it uses less digits than its factorization.

87983813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387.

The product of its digits is 290304, while the sum is 47.

The square root of 87983813 is about 9379.9687099691. The cubic root of 87983813 is about 444.7687440432.

The spelling of 87983813 in words is "eighty-seven million, nine hundred eighty-three thousand, eight hundred thirteen".