87097881 has 16 divisors (see below), whose sum is σ = 131647040. Its totient is φ = 50777280.

The previous prime is 87097877. The next prime is 87097883. The reversal of 87097881 is 18879078.

It is not a de Polignac number, because 87097881 - 2² = 87097877 is a prime.

It is a super-2 number, since 2×87097881² = 15172081749380322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87097881.

It is not an unprimeable number, because it can be changed into a prime (87097883) 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, 58030 + ... + 59511.

It is an arithmetic number, because the mean of its divisors is an integer number (8227940).

Almost surely, 2^87097881 is an apocalyptic number.

It is an amenable number.

87097881 is a deficient number, since it is larger than the sum of its proper divisors (44549159).

87097881 is a wasteful number, since it uses less digits than its factorization.

87097881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117576.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 87097881 is about 9332.6245504681. The cubic root of 87097881 is about 443.2708743612.

It can be divided in two parts, 87097 and 881, that added together give a palindrome (87978).

The spelling of 87097881 in words is "eighty-seven million, ninety-seven thousand, eight hundred eighty-one".