68423429 has 2 divisors, whose sum is σ = 68423430. Its totient is φ = 68423428.

The previous prime is 68423393. The next prime is 68423431. The reversal of 68423429 is 92432486.

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., 55100929 + 13322500 = 7423^2 + 3650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68423429 is a prime.

It is a super-2 number, since 2×68423429² = 9363531272236082, which contains 22 as substring.

Together with 68423431, 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 = 68423392 and 68423401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68423489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34211714 + 34211715.

It is an arithmetic number, because the mean of its divisors is an integer number (34211715).

Almost surely, 2^68423429 is an apocalyptic number.

It is an amenable number.

68423429 is a deficient number, since it is larger than the sum of its proper divisors (1).

68423429 is an equidigital number, since it uses as much as digits as its factorization.

68423429 is an odious number, because the sum of its binary digits is odd.

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

The square root of 68423429 is about 8271.8455619045. The cubic root of 68423429 is about 409.0109593092.

The spelling of 68423429 in words is "sixty-eight million, four hundred twenty-three thousand, four hundred twenty-nine".