42305439749 has 4 divisors (see below), whose sum is σ = 42314544300. Its totient is φ = 42296335200.

The previous prime is 42305439703. The next prime is 42305439797. The reversal of 42305439749 is 94793450324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20121422500 + 22184017249 = 141850^2 + 148943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42305439749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42305439697 and 42305439706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42305409749) 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, 4545302 + ... + 4554599.

It is an arithmetic number, because the mean of its divisors is an integer number (10578636075).

Almost surely, 2^42305439749 is an apocalyptic number.

It is an amenable number.

42305439749 is a deficient number, since it is larger than the sum of its proper divisors (9104551).

42305439749 is an equidigital number, since it uses as much as digits as its factorization.

42305439749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9104550.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 42305439749 in words is "forty-two billion, three hundred five million, four hundred thirty-nine thousand, seven hundred forty-nine".