86434289 has 2 divisors, whose sum is σ = 86434290. Its totient is φ = 86434288.

The previous prime is 86434277. The next prime is 86434301. The reversal of 86434289 is 98243468.

It is a balanced prime because it is at equal distance from previous prime (86434277) and next prime (86434301).

It can be written as a sum of positive squares in only one way, i.e., 86341264 + 93025 = 9292^2 + 305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86434289 is a prime.

It is not a weakly prime, because it can be changed into another prime (86434189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43217144 + 43217145.

It is an arithmetic number, because the mean of its divisors is an integer number (43217145).

Almost surely, 2^86434289 is an apocalyptic number.

It is an amenable number.

86434289 is a deficient number, since it is larger than the sum of its proper divisors (1).

86434289 is an equidigital number, since it uses as much as digits as its factorization.

86434289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 86434289 is about 9297.0043024622. The cubic root of 86434289 is about 442.1422543965.

It can be divided in two parts, 864 and 34289, that added together give a palindrome (35153).

The spelling of 86434289 in words is "eighty-six million, four hundred thirty-four thousand, two hundred eighty-nine".