86709031789 has 2 divisors, whose sum is σ = 86709031790. Its totient is φ = 86709031788.

The previous prime is 86709031699. The next prime is 86709031793. The reversal of 86709031789 is 98713090768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80964149764 + 5744882025 = 284542^2 + 75795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86709031789 is a prime.

It is a super-3 number, since 3×86709031789³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86709038789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43354515894 + 43354515895.

It is an arithmetic number, because the mean of its divisors is an integer number (43354515895).

Almost surely, 2^86709031789 is an apocalyptic number.

It is an amenable number.

86709031789 is a deficient number, since it is larger than the sum of its proper divisors (1).

86709031789 is an equidigital number, since it uses as much as digits as its factorization.

86709031789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 86709031789 in words is "eighty-six billion, seven hundred nine million, thirty-one thousand, seven hundred eighty-nine".