86881789 has 2 divisors, whose sum is σ = 86881790. Its totient is φ = 86881788.

The previous prime is 86881723. The next prime is 86881793. The reversal of 86881789 is 98718868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75116889 + 11764900 = 8667^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 86881789 - 2¹⁷ = 86750717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86881799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43440894 + 43440895.

It is an arithmetic number, because the mean of its divisors is an integer number (43440895).

Almost surely, 2^86881789 is an apocalyptic number.

It is an amenable number.

86881789 is a deficient number, since it is larger than the sum of its proper divisors (1).

86881789 is an equidigital number, since it uses as much as digits as its factorization.

86881789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 55.

The square root of 86881789 is about 9321.0401243638. The cubic root of 86881789 is about 442.9039820980.

The spelling of 86881789 in words is "eighty-six million, eight hundred eighty-one thousand, seven hundred eighty-nine".