42013352749 has 2 divisors, whose sum is σ = 42013352750. Its totient is φ = 42013352748.

The previous prime is 42013352743. The next prime is 42013352807. The reversal of 42013352749 is 94725331024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22472108649 + 19541244100 = 149907^2 + 139790^2 .

It is a cyclic number.

It is not a de Polignac number, because 42013352749 - 2³ = 42013352741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42013352741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006676374 + 21006676375.

It is an arithmetic number, because the mean of its divisors is an integer number (21006676375).

Almost surely, 2^42013352749 is an apocalyptic number.

It is an amenable number.

42013352749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42013352749 is an equidigital number, since it uses as much as digits as its factorization.

42013352749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 42013352749 in words is "forty-two billion, thirteen million, three hundred fifty-two thousand, seven hundred forty-nine".