86981734487 has 2 divisors, whose sum is σ = 86981734488. Its totient is φ = 86981734486.

The previous prime is 86981734363. The next prime is 86981734507. The reversal of 86981734487 is 78443718968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86981734487 - 2¹⁰ = 86981733463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86981736487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43490867243 + 43490867244.

It is an arithmetic number, because the mean of its divisors is an integer number (43490867244).

Almost surely, 2^86981734487 is an apocalyptic number.

86981734487 is a deficient number, since it is larger than the sum of its proper divisors (1).

86981734487 is an equidigital number, since it uses as much as digits as its factorization.

86981734487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65028096, while the sum is 65.

The spelling of 86981734487 in words is "eighty-six billion, nine hundred eighty-one million, seven hundred thirty-four thousand, four hundred eighty-seven".