42497393 has 2 divisors, whose sum is σ = 42497394. Its totient is φ = 42497392.

The previous prime is 42497387. The next prime is 42497417. The reversal of 42497393 is 39379424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38837824 + 3659569 = 6232^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 42497393 - 2⁸ = 42497137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42497393.

It is not a weakly prime, because it can be changed into another prime (42497303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21248696 + 21248697.

It is an arithmetic number, because the mean of its divisors is an integer number (21248697).

Almost surely, 2^42497393 is an apocalyptic number.

It is an amenable number.

42497393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42497393 is an equidigital number, since it uses as much as digits as its factorization.

42497393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 42497393 is about 6519.0024543637. The cubic root of 42497393 is about 348.9694666544.

The spelling of 42497393 in words is "forty-two million, four hundred ninety-seven thousand, three hundred ninety-three".