42743691217 has 2 divisors, whose sum is σ = 42743691218. Its totient is φ = 42743691216.

The previous prime is 42743691203. The next prime is 42743691227. The reversal of 42743691217 is 71219634724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41977453456 + 766237761 = 204884^2 + 27681^2 .

It is a cyclic number.

It is not a de Polignac number, because 42743691217 - 2¹⁵ = 42743658449 is a prime.

It is not a weakly prime, because it can be changed into another prime (42743691227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21371845608 + 21371845609.

It is an arithmetic number, because the mean of its divisors is an integer number (21371845609).

Almost surely, 2^42743691217 is an apocalyptic number.

It is an amenable number.

42743691217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42743691217 is an equidigital number, since it uses as much as digits as its factorization.

42743691217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The spelling of 42743691217 in words is "forty-two billion, seven hundred forty-three million, six hundred ninety-one thousand, two hundred seventeen".