87523487 has 4 divisors (see below), whose sum is σ = 91328880. Its totient is φ = 83718096.

The previous prime is 87523483. The next prime is 87523489. The reversal of 87523487 is 78432578.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87523487 - 2² = 87523483 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 (87523483) 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, 1902662 + ... + 1902707.

It is an arithmetic number, because the mean of its divisors is an integer number (22832220).

Almost surely, 2^87523487 is an apocalyptic number.

87523487 is a deficient number, since it is larger than the sum of its proper divisors (3805393).

87523487 is a wasteful number, since it uses less digits than its factorization.

87523487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805392.

The product of its digits is 376320, while the sum is 44.

The square root of 87523487 is about 9355.3988156572. The cubic root of 87523487 is about 443.9917196059.

Subtracting from 87523487 its reverse (78432578), we obtain a palindrome (9090909).

The spelling of 87523487 in words is "eighty-seven million, five hundred twenty-three thousand, four hundred eighty-seven".