87771081 has 8 divisors (see below), whose sum is σ = 121063680. Its totient is φ = 56496272.

The previous prime is 87771053. The next prime is 87771091. The reversal of 87771081 is 18017778.

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 87771081 - 2⁷ = 87770953 is a prime.

It is a super-2 number, since 2×87771081² = 15407525319817122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87771001) 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, 504345 + ... + 504518.

It is an arithmetic number, because the mean of its divisors is an integer number (15132960).

Almost surely, 2^87771081 is an apocalyptic number.

It is an amenable number.

87771081 is a deficient number, since it is larger than the sum of its proper divisors (33292599).

87771081 is a wasteful number, since it uses less digits than its factorization.

87771081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008895.

The product of its (nonzero) digits is 21952, while the sum is 39.

The square root of 87771081 is about 9368.6221505619. The cubic root of 87771081 is about 444.4099928133.

The spelling of 87771081 in words is "eighty-seven million, seven hundred seventy-one thousand, eighty-one".