87858539 has 4 divisors (see below), whose sum is σ = 87992520. Its totient is φ = 87724560.

The previous prime is 87858521. The next prime is 87858559. The reversal of 87858539 is 93585878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93585878 = 2 ⋅46792939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87858539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87858509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66002 + ... + 67319.

It is an arithmetic number, because the mean of its divisors is an integer number (21998130).

Almost surely, 2^87858539 is an apocalyptic number.

87858539 is a deficient number, since it is larger than the sum of its proper divisors (133981).

87858539 is a wasteful number, since it uses less digits than its factorization.

87858539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133980.

The product of its digits is 2419200, while the sum is 53.

The square root of 87858539 is about 9373.2885904575. The cubic root of 87858539 is about 444.5575520714.

The spelling of 87858539 in words is "eighty-seven million, eight hundred fifty-eight thousand, five hundred thirty-nine".