86807489 has 2 divisors, whose sum is σ = 86807490. Its totient is φ = 86807488.

The previous prime is 86807437. The next prime is 86807503. The reversal of 86807489 is 98470868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64529089 + 22278400 = 8033^2 + 4720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86807489 is a prime.

It is not a weakly prime, because it can be changed into another prime (86807089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43403744 + 43403745.

It is an arithmetic number, because the mean of its divisors is an integer number (43403745).

Almost surely, 2^86807489 is an apocalyptic number.

It is an amenable number.

86807489 is a deficient number, since it is larger than the sum of its proper divisors (1).

86807489 is an equidigital number, since it uses as much as digits as its factorization.

86807489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 86807489 is about 9317.0536651884. The cubic root of 86807489 is about 442.7776911478. Note that the first 3 decimals are identical.

The spelling of 86807489 in words is "eighty-six million, eight hundred seven thousand, four hundred eighty-nine".