87691347931 has 8 divisors (see below), whose sum is σ = 95727553200. Its totient is φ = 79665853440.

The previous prime is 87691347901. The next prime is 87691347937. The reversal of 87691347931 is 13974319678.

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 87691347931 - 2⁷ = 87691347803 is a prime.

It is a super-2 number, since 2×87691347931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87691347937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2660566 + ... + 2693323.

It is an arithmetic number, because the mean of its divisors is an integer number (11965944150).

Almost surely, 2^87691347931 is an apocalyptic number.

87691347931 is a deficient number, since it is larger than the sum of its proper divisors (8036205269).

87691347931 is a wasteful number, since it uses less digits than its factorization.

87691347931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355389.

The product of its digits is 6858432, while the sum is 58.

The spelling of 87691347931 in words is "eighty-seven billion, six hundred ninety-one million, three hundred forty-seven thousand, nine hundred thirty-one".