87347813 has 8 divisors (see below), whose sum is σ = 104166528. Its totient is φ = 71614224.

The previous prime is 87347809. The next prime is 87347837. The reversal of 87347813 is 31874378.

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 87347813 - 2² = 87347809 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 (87347803) 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, 271106 + ... + 271427.

It is an arithmetic number, because the mean of its divisors is an integer number (13020816).

Almost surely, 2^87347813 is an apocalyptic number.

It is an amenable number.

87347813 is a deficient number, since it is larger than the sum of its proper divisors (16818715).

87347813 is a wasteful number, since it uses less digits than its factorization.

87347813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542563.

The product of its digits is 112896, while the sum is 41.

The square root of 87347813 is about 9346.0051893844. The cubic root of 87347813 is about 443.6944658930.

The spelling of 87347813 in words is "eighty-seven million, three hundred forty-seven thousand, eight hundred thirteen".