87059561 has 4 divisors (see below), whose sum is σ = 88285824. Its totient is φ = 85833300.

The previous prime is 87059551. The next prime is 87059579. The reversal of 87059561 is 16595078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87059561 - 2¹⁰ = 87058537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87059551) 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, 613025 + ... + 613166.

It is an arithmetic number, because the mean of its divisors is an integer number (22071456).

Almost surely, 2^87059561 is an apocalyptic number.

It is an amenable number.

87059561 is a deficient number, since it is larger than the sum of its proper divisors (1226263).

87059561 is a wasteful number, since it uses less digits than its factorization.

87059561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226262.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 87059561 is about 9330.5713115543. The cubic root of 87059561 is about 443.2058569676.

The spelling of 87059561 in words is "eighty-seven million, fifty-nine thousand, five hundred sixty-one".