139840429 has 8 divisors (see below), whose sum is σ = 143557920. Its totient is φ = 136144176.

The previous prime is 139840409. The next prime is 139840433. The reversal of 139840429 is 924048931.

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 139840429 - 2⁵ = 139840397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139840391 and 139840400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139840409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8502 + ... + 18760.

It is an arithmetic number, because the mean of its divisors is an integer number (17944740).

Almost surely, 2^139840429 is an apocalyptic number.

It is an amenable number.

139840429 is a deficient number, since it is larger than the sum of its proper divisors (3717491).

139840429 is a wasteful number, since it uses less digits than its factorization.

139840429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10619.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 139840429 is about 11825.4145381885. The cubic root of 139840429 is about 519.0520562623.

The spelling of 139840429 in words is "one hundred thirty-nine million, eight hundred forty thousand, four hundred twenty-nine".