42092916809 has 2 divisors, whose sum is σ = 42092916810. Its totient is φ = 42092916808.

The previous prime is 42092916737. The next prime is 42092916821. The reversal of 42092916809 is 90861929024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40590966784 + 1501950025 = 201472^2 + 38755^2 .

It is a cyclic number.

It is not a de Polignac number, because 42092916809 - 2⁸ = 42092916553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42092916829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21046458404 + 21046458405.

It is an arithmetic number, because the mean of its divisors is an integer number (21046458405).

Almost surely, 2^42092916809 is an apocalyptic number.

It is an amenable number.

42092916809 is a deficient number, since it is larger than the sum of its proper divisors (1).

42092916809 is an equidigital number, since it uses as much as digits as its factorization.

42092916809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 42092916809 in words is "forty-two billion, ninety-two million, nine hundred sixteen thousand, eight hundred nine".