87046561 has 4 divisors (see below), whose sum is σ = 99481792. Its totient is φ = 74611332.

The previous prime is 87046537. The next prime is 87046571. The reversal of 87046561 is 16564078.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16564078 = 2 ⋅8282039.

It is a cyclic number.

It is not a de Polignac number, because 87046561 - 2⁵ = 87046529 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 87046561.

It is not an unprimeable number, because it can be changed into a prime (87046501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6217605 + ... + 6217618.

It is an arithmetic number, because the mean of its divisors is an integer number (24870448).

Almost surely, 2^87046561 is an apocalyptic number.

It is an amenable number.

87046561 is a deficient number, since it is larger than the sum of its proper divisors (12435231).

87046561 is a wasteful number, since it uses less digits than its factorization.

87046561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435230.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 87046561 is about 9329.8746508193. The cubic root of 87046561 is about 443.1837955847.

The spelling of 87046561 in words is "eighty-seven million, forty-six thousand, five hundred sixty-one".