87581011 has 8 divisors (see below), whose sum is σ = 100154880. Its totient is φ = 75022728.

The previous prime is 87580973. The next prime is 87581017. The reversal of 87581011 is 11018578.

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 87581011 - 2⁹ = 87580499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87581017) 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, 13110 + ... + 18628.

It is an arithmetic number, because the mean of its divisors is an integer number (12519360).

Almost surely, 2^87581011 is an apocalyptic number.

87581011 is a deficient number, since it is larger than the sum of its proper divisors (12573869).

87581011 is a wasteful number, since it uses less digits than its factorization.

87581011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 87581011 is about 9358.4726852195. The cubic root of 87581011 is about 444.0889681169.

Adding to 87581011 its reverse (11018578), we get a palindrome (98599589).

The spelling of 87581011 in words is "eighty-seven million, five hundred eighty-one thousand, eleven".