87830813 has 8 divisors (see below), whose sum is σ = 104742528. Its totient is φ = 72010224.

The previous prime is 87830803. The next prime is 87830819. The reversal of 87830813 is 31803878.

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 87830813 - 2⁴ = 87830797 is a prime.

It is a super-3 number, since 3×87830813³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87830819) 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, 272606 + ... + 272927.

It is an arithmetic number, because the mean of its divisors is an integer number (13092816).

Almost surely, 2^87830813 is an apocalyptic number.

It is an amenable number.

87830813 is a deficient number, since it is larger than the sum of its proper divisors (16911715).

87830813 is a wasteful number, since it uses less digits than its factorization.

87830813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545563.

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

The square root of 87830813 is about 9371.8094837657. The cubic root of 87830813 is about 444.5107833314.

The spelling of 87830813 in words is "eighty-seven million, eight hundred thirty thousand, eight hundred thirteen".