87731008884867 has 4 divisors (see below), whose sum is σ = 116974678513160. Its totient is φ = 58487339256576.

The previous prime is 87731008884851. The next prime is 87731008884923. The reversal of 87731008884867 is 76848880013778.

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

It is not a de Polignac number, because 87731008884867 - 2⁴ = 87731008884851 is a prime.

It is a super-2 number, since 2×87731008884867² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87731008884817) 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, 14621834814142 + ... + 14621834814147.

It is an arithmetic number, because the mean of its divisors is an integer number (29243669628290).

Almost surely, 2^{87731008884867} is an apocalyptic number.

87731008884867 is a deficient number, since it is larger than the sum of its proper divisors (29243669628293).

87731008884867 is a wasteful number, since it uses less digits than its factorization.

87731008884867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29243669628292.

The product of its (nonzero) digits is 809238528, while the sum is 75.

The spelling of 87731008884867 in words is "eighty-seven trillion, seven hundred thirty-one billion, eight million, eight hundred eighty-four thousand, eight hundred sixty-seven".