87820537 has 8 divisors (see below), whose sum is σ = 101288000. Its totient is φ = 74583504.

The previous prime is 87820529. The next prime is 87820547. The reversal of 87820537 is 73502878.

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 87820537 - 2³ = 87820529 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 87820537.

It is not an unprimeable number, because it can be changed into a prime (87820517) 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, 56787 + ... + 58312.

It is an arithmetic number, because the mean of its divisors is an integer number (12661000).

Almost surely, 2^87820537 is an apocalyptic number.

It is an amenable number.

87820537 is a deficient number, since it is larger than the sum of its proper divisors (13467463).

87820537 is a wasteful number, since it uses less digits than its factorization.

87820537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115215.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 87820537 is about 9371.2612278177. The cubic root of 87820537 is about 444.4934470808.

The spelling of 87820537 in words is "eighty-seven million, eight hundred twenty thousand, five hundred thirty-seven".