138167429 has 2 divisors, whose sum is σ = 138167430. Its totient is φ = 138167428.

The previous prime is 138167413. The next prime is 138167431. The reversal of 138167429 is 924761831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 33616804 = 10225^2 + 5798^2 .

It is a cyclic number.

It is not a de Polignac number, because 138167429 - 2⁴ = 138167413 is a prime.

It is a Sophie Germain prime.

Together with 138167431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138167459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69083714 + 69083715.

It is an arithmetic number, because the mean of its divisors is an integer number (69083715).

Almost surely, 2^138167429 is an apocalyptic number.

It is an amenable number.

138167429 is a deficient number, since it is larger than the sum of its proper divisors (1).

138167429 is an equidigital number, since it uses as much as digits as its factorization.

138167429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 138167429 is about 11754.4642157778. The cubic root of 138167429 is about 516.9738297470.

The spelling of 138167429 in words is "one hundred thirty-eight million, one hundred sixty-seven thousand, four hundred twenty-nine".