87111312247 has 4 divisors (see below), whose sum is σ = 87144550776. Its totient is φ = 87078073720.

The previous prime is 87111312217. The next prime is 87111312287. The reversal of 87111312247 is 74221311178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87111312247 - 2¹¹ = 87111310199 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 (87111312217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16615333 + ... + 16620574.

It is an arithmetic number, because the mean of its divisors is an integer number (21786137694).

Almost surely, 2^87111312247 is an apocalyptic number.

87111312247 is a deficient number, since it is larger than the sum of its proper divisors (33238529).

87111312247 is a wasteful number, since it uses less digits than its factorization.

87111312247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33238528.

The product of its digits is 18816, while the sum is 37.

The spelling of 87111312247 in words is "eighty-seven billion, one hundred eleven million, three hundred twelve thousand, two hundred forty-seven".