87732561 has 8 divisors (see below), whose sum is σ = 133687744. Its totient is φ = 50132880.

The previous prime is 87732527. The next prime is 87732583. The reversal of 87732561 is 16523778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87732561 - 2⁹ = 87732049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87732521) 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, 2088850 + ... + 2088891.

It is an arithmetic number, because the mean of its divisors is an integer number (16710968).

Almost surely, 2^87732561 is an apocalyptic number.

It is an amenable number.

87732561 is a deficient number, since it is larger than the sum of its proper divisors (45955183).

87732561 is a wasteful number, since it uses less digits than its factorization.

87732561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177751.

The product of its digits is 70560, while the sum is 39.

The square root of 87732561 is about 9366.5661263880. The cubic root of 87732561 is about 444.3449707217.

The spelling of 87732561 in words is "eighty-seven million, seven hundred thirty-two thousand, five hundred sixty-one".