139857429 has 8 divisors (see below), whose sum is σ = 186964992. Its totient is φ = 92994080.

The previous prime is 139857391. The next prime is 139857449. The reversal of 139857429 is 924758931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139857429 - 2⁸ = 139857173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139857449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59712 + ... + 62009.

It is an arithmetic number, because the mean of its divisors is an integer number (23370624).

Almost surely, 2^139857429 is an apocalyptic number.

It is an amenable number.

139857429 is a deficient number, since it is larger than the sum of its proper divisors (47107563).

139857429 is a wasteful number, since it uses less digits than its factorization.

139857429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122107.

The product of its digits is 544320, while the sum is 48.

The square root of 139857429 is about 11826.1333072142. The cubic root of 139857429 is about 519.0730886335.

The spelling of 139857429 in words is "one hundred thirty-nine million, eight hundred fifty-seven thousand, four hundred twenty-nine".