42739000509 has 4 divisors (see below), whose sum is σ = 56985334016. Its totient is φ = 28492667004.

The previous prime is 42739000487. The next prime is 42739000537. The reversal of 42739000509 is 90500093724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42739000509 - 2⁹ = 42738999997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42739000709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7123166749 + ... + 7123166754.

It is an arithmetic number, because the mean of its divisors is an integer number (14246333504).

Almost surely, 2^42739000509 is an apocalyptic number.

It is an amenable number.

42739000509 is a deficient number, since it is larger than the sum of its proper divisors (14246333507).

42739000509 is a wasteful number, since it uses less digits than its factorization.

42739000509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14246333506.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 42739000509 in words is "forty-two billion, seven hundred thirty-nine million, five hundred nine", and thus it is an aban number.