42543340597 has 2 divisors, whose sum is σ = 42543340598. Its totient is φ = 42543340596.

The previous prime is 42543340459. The next prime is 42543340639. The reversal of 42543340597 is 79504334524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41502245841 + 1041094756 = 203721^2 + 32266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543340597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42543340297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271670298 + 21271670299.

It is an arithmetic number, because the mean of its divisors is an integer number (21271670299).

Almost surely, 2^42543340597 is an apocalyptic number.

It is an amenable number.

42543340597 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543340597 is an equidigital number, since it uses as much as digits as its factorization.

42543340597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 42543340597 in words is "forty-two billion, five hundred forty-three million, three hundred forty thousand, five hundred ninety-seven".