86861138031029 has 2 divisors, whose sum is σ = 86861138031030. Its totient is φ = 86861138031028.

The previous prime is 86861138031013. The next prime is 86861138031049. The reversal of 86861138031029 is 92013083116868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54641323968529 + 32219814062500 = 7391977^2 + 5676250^2 .

It is a cyclic number.

It is not a de Polignac number, because 86861138031029 - 2⁴ = 86861138031013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86861138031049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43430569015514 + 43430569015515.

It is an arithmetic number, because the mean of its divisors is an integer number (43430569015515).

Almost surely, 2^{86861138031029} is an apocalyptic number.

It is an amenable number.

86861138031029 is a deficient number, since it is larger than the sum of its proper divisors (1).

86861138031029 is an equidigital number, since it uses as much as digits as its factorization.

86861138031029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 86861138031029 in words is "eighty-six trillion, eight hundred sixty-one billion, one hundred thirty-eight million, thirty-one thousand, twenty-nine".