87555559 has 16 divisors (see below), whose sum is σ = 114101568. Its totient is φ = 65198592.

The previous prime is 87555547. The next prime is 87555569. The reversal of 87555559 is 95555578.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87555559 - 2⁵ = 87555527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87555509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26752 + ... + 29845.

It is an arithmetic number, because the mean of its divisors is an integer number (7131348).

Almost surely, 2^87555559 is an apocalyptic number.

87555559 is a deficient number, since it is larger than the sum of its proper divisors (26546009).

87555559 is a wasteful number, since it uses less digits than its factorization.

87555559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56634.

The product of its digits is 1575000, while the sum is 49.

The square root of 87555559 is about 9357.1127491337. The cubic root of 87555559 is about 444.0459449114.

The spelling of 87555559 in words is "eighty-seven million, five hundred fifty-five thousand, five hundred fifty-nine".