67429139 has 2 divisors, whose sum is σ = 67429140. Its totient is φ = 67429138.

The previous prime is 67429129. The next prime is 67429163. The reversal of 67429139 is 93192476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67429139 - 2¹⁶ = 67363603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67429096 and 67429105.

It is not a weakly prime, because it can be changed into another prime (67429129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33714569 + 33714570.

It is an arithmetic number, because the mean of its divisors is an integer number (33714570).

Almost surely, 2^67429139 is an apocalyptic number.

67429139 is a deficient number, since it is larger than the sum of its proper divisors (1).

67429139 is an equidigital number, since it uses as much as digits as its factorization.

67429139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 67429139 is about 8211.5247670576. The cubic root of 67429139 is about 407.0201138271.

The spelling of 67429139 in words is "sixty-seven million, four hundred twenty-nine thousand, one hundred thirty-nine".