86408869 has 2 divisors, whose sum is σ = 86408870. Its totient is φ = 86408868.

The previous prime is 86408867. The next prime is 86408911. The reversal of 86408869 is 96880468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83484769 + 2924100 = 9137^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 86408869 - 2¹ = 86408867 is a prime.

It is a super-2 number, since 2×86408869² = 14932985283718322, which contains 22 as substring.

Together with 86408867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86408867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43204434 + 43204435.

It is an arithmetic number, because the mean of its divisors is an integer number (43204435).

Almost surely, 2^86408869 is an apocalyptic number.

It is an amenable number.

86408869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86408869 is an equidigital number, since it uses as much as digits as its factorization.

86408869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 86408869 is about 9295.6370948956. The cubic root of 86408869 is about 442.0989060208.

The spelling of 86408869 in words is "eighty-six million, four hundred eight thousand, eight hundred sixty-nine".