42408435697 has 2 divisors, whose sum is σ = 42408435698. Its totient is φ = 42408435696.

The previous prime is 42408435673. The next prime is 42408435787. The reversal of 42408435697 is 79653480424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41258140641 + 1150295056 = 203121^2 + 33916^2 .

It is a cyclic number.

It is not a de Polignac number, because 42408435697 - 2¹⁹ = 42407911409 is a prime.

It is not a weakly prime, because it can be changed into another prime (42408435607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21204217848 + 21204217849.

It is an arithmetic number, because the mean of its divisors is an integer number (21204217849).

Almost surely, 2^42408435697 is an apocalyptic number.

It is an amenable number.

42408435697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42408435697 is an equidigital number, since it uses as much as digits as its factorization.

42408435697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 42408435697 in words is "forty-two billion, four hundred eight million, four hundred thirty-five thousand, six hundred ninety-seven".