42140040097 has 2 divisors, whose sum is σ = 42140040098. Its totient is φ = 42140040096.

The previous prime is 42140040073. The next prime is 42140040149. The reversal of 42140040097 is 79004004124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38419528081 + 3720512016 = 196009^2 + 60996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42140040097 is a prime.

It is not a weakly prime, because it can be changed into another prime (42140040697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21070020048 + 21070020049.

It is an arithmetic number, because the mean of its divisors is an integer number (21070020049).

Almost surely, 2^42140040097 is an apocalyptic number.

It is an amenable number.

42140040097 is a deficient number, since it is larger than the sum of its proper divisors (1).

42140040097 is an equidigital number, since it uses as much as digits as its factorization.

42140040097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 42140040097 in words is "forty-two billion, one hundred forty million, forty thousand, ninety-seven".