42404040397 has 2 divisors, whose sum is σ = 42404040398. Its totient is φ = 42404040396.

The previous prime is 42404040361. The next prime is 42404040431. The reversal of 42404040397 is 79304040424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23036864841 + 19367175556 = 151779^2 + 139166^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404040397 - 2¹⁵ = 42404007629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42404040317) 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, 21202020198 + 21202020199.

It is an arithmetic number, because the mean of its divisors is an integer number (21202020199).

Almost surely, 2^42404040397 is an apocalyptic number.

It is an amenable number.

42404040397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404040397 is an equidigital number, since it uses as much as digits as its factorization.

42404040397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 42404040397 in words is "forty-two billion, four hundred four million, forty thousand, three hundred ninety-seven".