42917457749 has 2 divisors, whose sum is σ = 42917457750. Its totient is φ = 42917457748.

The previous prime is 42917457733. The next prime is 42917457787. The reversal of 42917457749 is 94775471924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38727484849 + 4189972900 = 196793^2 + 64730^2 .

It is a cyclic number.

It is not a de Polignac number, because 42917457749 - 2⁴ = 42917457733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42917457949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21458728874 + 21458728875.

It is an arithmetic number, because the mean of its divisors is an integer number (21458728875).

Almost surely, 2^42917457749 is an apocalyptic number.

It is an amenable number.

42917457749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42917457749 is an equidigital number, since it uses as much as digits as its factorization.

42917457749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 59.

The spelling of 42917457749 in words is "forty-two billion, nine hundred seventeen million, four hundred fifty-seven thousand, seven hundred forty-nine".