42249793 has 2 divisors, whose sum is σ = 42249794. Its totient is φ = 42249792.

The previous prime is 42249791. The next prime is 42249797. The reversal of 42249793 is 39794224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24127744 + 18122049 = 4912^2 + 4257^2 .

It is a cyclic number.

It is not a de Polignac number, because 42249793 - 2¹ = 42249791 is a prime.

Together with 42249791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42249791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21124896 + 21124897.

It is an arithmetic number, because the mean of its divisors is an integer number (21124897).

Almost surely, 2^42249793 is an apocalyptic number.

It is an amenable number.

42249793 is a deficient number, since it is larger than the sum of its proper divisors (1).

42249793 is an equidigital number, since it uses as much as digits as its factorization.

42249793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 42249793 is about 6499.9840769036. The cubic root of 42249793 is about 348.2904195866.

The spelling of 42249793 in words is "forty-two million, two hundred forty-nine thousand, seven hundred ninety-three".