86329889 has 2 divisors, whose sum is σ = 86329890. Its totient is φ = 86329888.

The previous prime is 86329883. The next prime is 86329891. The reversal of 86329889 is 98892368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85248289 + 1081600 = 9233^2 + 1040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86329889 is a prime.

Together with 86329891, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86329889.

It is not a weakly prime, because it can be changed into another prime (86329883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43164944 + 43164945.

It is an arithmetic number, because the mean of its divisors is an integer number (43164945).

Almost surely, 2^86329889 is an apocalyptic number.

It is an amenable number.

86329889 is a deficient number, since it is larger than the sum of its proper divisors (1).

86329889 is an equidigital number, since it uses as much as digits as its factorization.

86329889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 86329889 is about 9291.3878941738. The cubic root of 86329889 is about 441.9641682493.

The spelling of 86329889 in words is "eighty-six million, three hundred twenty-nine thousand, eight hundred eighty-nine".