42442997 has 2 divisors, whose sum is σ = 42442998. Its totient is φ = 42442996.

The previous prime is 42442993. The next prime is 42443039. The reversal of 42442997 is 79924424.

42442997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31427236 + 11015761 = 5606^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 42442997 - 2² = 42442993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42442993) 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, 21221498 + 21221499.

It is an arithmetic number, because the mean of its divisors is an integer number (21221499).

Almost surely, 2^42442997 is an apocalyptic number.

It is an amenable number.

42442997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442997 is an equidigital number, since it uses as much as digits as its factorization.

42442997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 42442997 is about 6514.8290077331. The cubic root of 42442997 is about 348.8205112586.

The spelling of 42442997 in words is "forty-two million, four hundred forty-two thousand, nine hundred ninety-seven".