87927561 has 24 divisors (see below), whose sum is σ = 131056640. Its totient is φ = 56772576.

The previous prime is 87927557. The next prime is 87927589. The reversal of 87927561 is 16572978.

87927561 is a `hidden beast` number, since 87 + 9 + 2 + 7 + 561 = 666.

It is not a de Polignac number, because 87927561 - 2² = 87927557 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87927061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48255 + ... + 50043.

Almost surely, 2^87927561 is an apocalyptic number.

It is an amenable number.

87927561 is a deficient number, since it is larger than the sum of its proper divisors (43129079).

87927561 is a wasteful number, since it uses less digits than its factorization.

87927561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1962 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 87927561 is about 9376.9697130790. The cubic root of 87927561 is about 444.6739369631.

It can be divided in two parts, 87927 and 561, that added together give a palindrome (88488).

The spelling of 87927561 in words is "eighty-seven million, nine hundred twenty-seven thousand, five hundred sixty-one".