87933481 has 8 divisors (see below), whose sum is σ = 91369800. Its totient is φ = 84524160.

The previous prime is 87933473. The next prime is 87933493. The reversal of 87933481 is 18433978.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64080025 + 23853456 = 8005^2 + 4884^2 .

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 87933481 - 2³ = 87933473 is a prime.

It is a super-2 number, since 2×87933481² = 15464594161554722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87933421) 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, 21 + ... + 13261.

It is an arithmetic number, because the mean of its divisors is an integer number (11421225).

Almost surely, 2^87933481 is an apocalyptic number.

It is an amenable number.

87933481 is a deficient number, since it is larger than the sum of its proper divisors (3436319).

87933481 is a wasteful number, since it uses less digits than its factorization.

87933481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13499.

The product of its digits is 145152, while the sum is 43.

The square root of 87933481 is about 9377.2853747766. The cubic root of 87933481 is about 444.6839164302.

The spelling of 87933481 in words is "eighty-seven million, nine hundred thirty-three thousand, four hundred eighty-one".