86423429 has 2 divisors, whose sum is σ = 86423430. Its totient is φ = 86423428.

The previous prime is 86423387. The next prime is 86423431. The reversal of 86423429 is 92432468.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43586404 + 42837025 = 6602^2 + 6545^2 .

It is a cyclic number.

It is not a de Polignac number, because 86423429 - 2⁸ = 86423173 is a prime.

Together with 86423431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86423392 and 86423401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86423329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43211714 + 43211715.

It is an arithmetic number, because the mean of its divisors is an integer number (43211715).

Almost surely, 2^86423429 is an apocalyptic number.

It is an amenable number.

86423429 is a deficient number, since it is larger than the sum of its proper divisors (1).

86423429 is an equidigital number, since it uses as much as digits as its factorization.

86423429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 86423429 is about 9296.4202250113. The cubic root of 86423429 is about 442.1237360282.

The spelling of 86423429 in words is "eighty-six million, four hundred twenty-three thousand, four hundred twenty-nine".