42744017837 has 2 divisors, whose sum is σ = 42744017838. Its totient is φ = 42744017836.

The previous prime is 42744017819. The next prime is 42744017839. The reversal of 42744017837 is 73871044724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41523843076 + 1220174761 = 203774^2 + 34931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42744017837 is a prime.

Together with 42744017839, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42744017791 and 42744017800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42744017839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21372008918 + 21372008919.

It is an arithmetic number, because the mean of its divisors is an integer number (21372008919).

Almost surely, 2^42744017837 is an apocalyptic number.

It is an amenable number.

42744017837 is a deficient number, since it is larger than the sum of its proper divisors (1).

42744017837 is an equidigital number, since it uses as much as digits as its factorization.

42744017837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 42744017837 in words is "forty-two billion, seven hundred forty-four million, seventeen thousand, eight hundred thirty-seven".