42169997 has 2 divisors, whose sum is σ = 42169998. Its totient is φ = 42169996.

The previous prime is 42169943. The next prime is 42170003. The reversal of 42169997 is 79996124.

42169997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39300361 + 2869636 = 6269^2 + 1694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42169997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42169937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21084998 + 21084999.

It is an arithmetic number, because the mean of its divisors is an integer number (21084999).

Almost surely, 2^42169997 is an apocalyptic number.

It is an amenable number.

42169997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42169997 is an equidigital number, since it uses as much as digits as its factorization.

42169997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 42169997 is about 6493.8430070337. The cubic root of 42169997 is about 348.0710126144.

The spelling of 42169997 in words is "forty-two million, one hundred sixty-nine thousand, nine hundred ninety-seven".