139930429 has 2 divisors, whose sum is σ = 139930430. Its totient is φ = 139930428.

The previous prime is 139930403. The next prime is 139930463. The reversal of 139930429 is 924039931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 53626329 = 9290^2 + 7323^2 .

It is a cyclic number.

It is not a de Polignac number, because 139930429 - 2⁹ = 139929917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139930391 and 139930400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139930129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69965214 + 69965215.

It is an arithmetic number, because the mean of its divisors is an integer number (69965215).

Almost surely, 2^139930429 is an apocalyptic number.

It is an amenable number.

139930429 is a deficient number, since it is larger than the sum of its proper divisors (1).

139930429 is an equidigital number, since it uses as much as digits as its factorization.

139930429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 139930429 is about 11829.2192895389. The cubic root of 139930429 is about 519.1633847417.

The spelling of 139930429 in words is "one hundred thirty-nine million, nine hundred thirty thousand, four hundred twenty-nine".