67648429 has 2 divisors, whose sum is σ = 67648430. Its totient is φ = 67648428.

The previous prime is 67648393. The next prime is 67648447. The reversal of 67648429 is 92484676.

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., 62252100 + 5396329 = 7890^2 + 2323^2 .

It is a cyclic number.

It is not a de Polignac number, because 67648429 - 2⁹ = 67647917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67648489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33824214 + 33824215.

It is an arithmetic number, because the mean of its divisors is an integer number (33824215).

Almost surely, 2^67648429 is an apocalyptic number.

It is an amenable number.

67648429 is a deficient number, since it is larger than the sum of its proper divisors (1).

67648429 is an equidigital number, since it uses as much as digits as its factorization.

67648429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The square root of 67648429 is about 8224.8665034759. The cubic root of 67648429 is about 407.4608671820.

The spelling of 67648429 in words is "sixty-seven million, six hundred forty-eight thousand, four hundred twenty-nine".