86919686987 has 12 divisors (see below), whose sum is σ = 102619774440. Its totient is φ = 73390607136.

The previous prime is 86919686983. The next prime is 86919686993. The reversal of 86919686987 is 78968691968.

It is not a de Polignac number, because 86919686987 - 2² = 86919686983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86919686981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13234562 + ... + 13241127.

It is an arithmetic number, because the mean of its divisors is an integer number (8551647870).

Almost surely, 2^86919686987 is an apocalyptic number.

86919686987 is a deficient number, since it is larger than the sum of its proper divisors (15700087453).

86919686987 is a wasteful number, since it uses less digits than its factorization.

86919686987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26475770 (or 26475763 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 77.

The spelling of 86919686987 in words is "eighty-six billion, nine hundred nineteen million, six hundred eighty-six thousand, nine hundred eighty-seven".