87537823 has 4 divisors (see below), whose sum is σ = 88312608. Its totient is φ = 86763040.

The previous prime is 87537803. The next prime is 87537833. The reversal of 87537823 is 32873578.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87537823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87537823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87537803) 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, 387223 + ... + 387448.

It is an arithmetic number, because the mean of its divisors is an integer number (22078152).

Almost surely, 2^87537823 is an apocalyptic number.

87537823 is a deficient number, since it is larger than the sum of its proper divisors (774785).

87537823 is a wasteful number, since it uses less digits than its factorization.

87537823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774784.

The product of its digits is 282240, while the sum is 43.

The square root of 87537823 is about 9356.1649728935. The cubic root of 87537823 is about 444.0159596433.

The spelling of 87537823 in words is "eighty-seven million, five hundred thirty-seven thousand, eight hundred twenty-three".