139168429 has 2 divisors, whose sum is σ = 139168430. Its totient is φ = 139168428.

The previous prime is 139168417. The next prime is 139168439. The reversal of 139168429 is 924861931.

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., 106564329 + 32604100 = 10323^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 139168429 - 2⁵ = 139168397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139168439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69584214 + 69584215.

It is an arithmetic number, because the mean of its divisors is an integer number (69584215).

Almost surely, 2^139168429 is an apocalyptic number.

It is an amenable number.

139168429 is a deficient number, since it is larger than the sum of its proper divisors (1).

139168429 is an equidigital number, since it uses as much as digits as its factorization.

139168429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 139168429 is about 11796.9669407013. The cubic root of 139168429 is about 518.2192899388.

The spelling of 139168429 in words is "one hundred thirty-nine million, one hundred sixty-eight thousand, four hundred twenty-nine".