42239129929 has 8 divisors (see below), whose sum is σ = 42692698440. Its totient is φ = 41787666816.

The previous prime is 42239129923. The next prime is 42239129939. The reversal of 42239129929 is 92992193224.

It can be written as a sum of positive squares in 4 ways, for example, as 18284448400 + 23954681529 = 135220^2 + 154773^2 .

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 42239129929 - 2⁵ = 42239129897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42239129923) 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, 485994 + ... + 566275.

It is an arithmetic number, because the mean of its divisors is an integer number (5336587305).

Almost surely, 2^42239129929 is an apocalyptic number.

It is an amenable number.

42239129929 is a deficient number, since it is larger than the sum of its proper divisors (453568511).

42239129929 is a wasteful number, since it uses less digits than its factorization.

42239129929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052699.

The product of its digits is 1259712, while the sum is 52.

The spelling of 42239129929 in words is "forty-two billion, two hundred thirty-nine million, one hundred twenty-nine thousand, nine hundred twenty-nine".