42797 has 2 divisors, whose sum is σ = 42798. Its totient is φ = 42796.

The previous prime is 42793. The next prime is 42821. The reversal of 42797 is 79724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42436 + 361 = 206^2 + 19^2 .

42797 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 42797 - 2² = 42793 is a prime.

It is a Chen prime.

It is a plaindrome in base 8.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21398 + 21399.

It is an arithmetic number, because the mean of its divisors is an integer number (21399).

2⁴²⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

42797 is a deficient number, since it is larger than the sum of its proper divisors (1).

42797 is an equidigital number, since it uses as much as digits as its factorization.

42797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 42797 is about 206.8743580050. The cubic root of 42797 is about 34.9787626264.

The spelling of 42797 in words is "forty-two thousand, seven hundred ninety-seven".