87311081 has 8 divisors (see below), whose sum is σ = 102575424. Its totient is φ = 73267920.

The previous prime is 87311057. The next prime is 87311089. The reversal of 87311081 is 18011378.

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

It is not a de Polignac number, because 87311081 - 2¹⁰ = 87310057 is a prime.

It is a super-3 number, since 3×87311081³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87311089) 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, 305141 + ... + 305426.

It is an arithmetic number, because the mean of its divisors is an integer number (12821928).

Almost surely, 2^87311081 is an apocalyptic number.

It is an amenable number.

87311081 is a deficient number, since it is larger than the sum of its proper divisors (15264343).

87311081 is a wasteful number, since it uses less digits than its factorization.

87311081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610591.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 87311081 is about 9344.0398650691. The cubic root of 87311081 is about 443.6322621979.

The spelling of 87311081 in words is "eighty-seven million, three hundred eleven thousand, eighty-one".