87881605 has 8 divisors (see below), whose sum is σ = 120523392. Its totient is φ = 60261648.

The previous prime is 87881603. The next prime is 87881609. The reversal of 87881605 is 50618878.

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

It is a cyclic number.

It is not a de Polignac number, because 87881605 - 2¹ = 87881603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87881603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255417 + ... + 1255486.

It is an arithmetic number, because the mean of its divisors is an integer number (15065424).

Almost surely, 2^87881605 is an apocalyptic number.

It is an amenable number.

87881605 is a deficient number, since it is larger than the sum of its proper divisors (32641787).

87881605 is a wasteful number, since it uses less digits than its factorization.

87881605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510915.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 87881605 is about 9374.5189209900. The cubic root of 87881605 is about 444.5964527382.

The spelling of 87881605 in words is "eighty-seven million, eight hundred eighty-one thousand, six hundred five".