42497797 has 2 divisors, whose sum is σ = 42497798. Its totient is φ = 42497796.

The previous prime is 42497783. The next prime is 42497821. The reversal of 42497797 is 79779424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26224641 + 16273156 = 5121^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 42497797 - 2¹¹ = 42495749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42497797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42417797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21248898 + 21248899.

It is an arithmetic number, because the mean of its divisors is an integer number (21248899).

Almost surely, 2^42497797 is an apocalyptic number.

It is an amenable number.

42497797 is a deficient number, since it is larger than the sum of its proper divisors (1).

42497797 is an equidigital number, since it uses as much as digits as its factorization.

42497797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 42497797 is about 6519.0334406260. The cubic root of 42497797 is about 348.9705724730.

The spelling of 42497797 in words is "forty-two million, four hundred ninety-seven thousand, seven hundred ninety-seven".