42739312249 has 2 divisors, whose sum is σ = 42739312250. Its totient is φ = 42739312248.

The previous prime is 42739312181. The next prime is 42739312277. The reversal of 42739312249 is 94221393724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27682304400 + 15057007849 = 166380^2 + 122707^2 .

It is a cyclic number.

It is not a de Polignac number, because 42739312249 - 2¹⁵ = 42739279481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42739312199 and 42739312208.

It is not a weakly prime, because it can be changed into another prime (42739312289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21369656124 + 21369656125.

It is an arithmetic number, because the mean of its divisors is an integer number (21369656125).

Almost surely, 2^42739312249 is an apocalyptic number.

It is an amenable number.

42739312249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42739312249 is an equidigital number, since it uses as much as digits as its factorization.

42739312249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The spelling of 42739312249 in words is "forty-two billion, seven hundred thirty-nine million, three hundred twelve thousand, two hundred forty-nine".