42909796139 has 4 divisors (see below), whose sum is σ = 49039767024. Its totient is φ = 36779825256.

The previous prime is 42909796123. The next prime is 42909796151. The reversal of 42909796139 is 93169790924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42909796139 - 2⁴ = 42909796123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42909796109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3064985432 + ... + 3064985445.

It is an arithmetic number, because the mean of its divisors is an integer number (12259941756).

Almost surely, 2^42909796139 is an apocalyptic number.

42909796139 is a deficient number, since it is larger than the sum of its proper divisors (6129970885).

42909796139 is an equidigital number, since it uses as much as digits as its factorization.

42909796139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129970884.

The product of its (nonzero) digits is 6613488, while the sum is 59.

The spelling of 42909796139 in words is "forty-two billion, nine hundred nine million, seven hundred ninety-six thousand, one hundred thirty-nine".