86429429 has 2 divisors, whose sum is σ = 86429430. Its totient is φ = 86429428.

The previous prime is 86429419. The next prime is 86429443. The reversal of 86429429 is 92492468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 40934404 = 6745^2 + 6398^2 .

It is a cyclic number.

It is not a de Polignac number, because 86429429 - 2¹² = 86425333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86429429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86429419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43214714 + 43214715.

It is an arithmetic number, because the mean of its divisors is an integer number (43214715).

Almost surely, 2^86429429 is an apocalyptic number.

It is an amenable number.

86429429 is a deficient number, since it is larger than the sum of its proper divisors (1).

86429429 is an equidigital number, since it uses as much as digits as its factorization.

86429429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 86429429 is about 9296.7429242719. The cubic root of 86429429 is about 442.1339673627.

The spelling of 86429429 in words is "eighty-six million, four hundred twenty-nine thousand, four hundred twenty-nine".