42002920079 has 2 divisors, whose sum is σ = 42002920080. Its totient is φ = 42002920078.

The previous prime is 42002920073. The next prime is 42002920081. The reversal of 42002920079 is 97002920024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42002920079 is a prime.

It is a super-2 number, since 2×42002920079² (a number of 22 digits) contains 22 as substring.

Together with 42002920081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42002920073) 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, 21001460039 + 21001460040.

It is an arithmetic number, because the mean of its divisors is an integer number (21001460040).

Almost surely, 2^42002920079 is an apocalyptic number.

42002920079 is a deficient number, since it is larger than the sum of its proper divisors (1).

42002920079 is an equidigital number, since it uses as much as digits as its factorization.

42002920079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

Subtracting 42002920079 from its reverse (97002920024), we obtain a palindrome (54999999945).

The spelling of 42002920079 in words is "forty-two billion, two million, nine hundred twenty thousand, seventy-nine".