87531293 has 4 divisors (see below), whose sum is σ = 87604668. Its totient is φ = 87457920.

The previous prime is 87531287. The next prime is 87531313. The reversal of 87531293 is 39213578.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38278969 + 49252324 = 6187^2 + 7018^2 .

It is a cyclic number.

It is not a de Polignac number, because 87531293 - 2⁴ = 87531277 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 (87530293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34868 + ... + 37293.

It is an arithmetic number, because the mean of its divisors is an integer number (21901167).

Almost surely, 2^87531293 is an apocalyptic number.

It is an amenable number.

87531293 is a deficient number, since it is larger than the sum of its proper divisors (73375).

87531293 is a wasteful number, since it uses less digits than its factorization.

87531293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73374.

The product of its digits is 45360, while the sum is 38.

The square root of 87531293 is about 9355.8159986182. The cubic root of 87531293 is about 444.0049187156.

The spelling of 87531293 in words is "eighty-seven million, five hundred thirty-one thousand, two hundred ninety-three".