42497793 has 24 divisors (see below), whose sum is σ = 67901288. Its totient is φ = 25443072.

The previous prime is 42497783. The next prime is 42497797. The reversal of 42497793 is 39779424.

It can be written as a sum of positive squares in 4 ways, for example, as 20903184 + 21594609 = 4572^2 + 4647^2 .

It is not a de Polignac number, because 42497793 - 2⁵ = 42497761 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42497797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 580 + ... + 9237.

Almost surely, 2^42497793 is an apocalyptic number.

It is an amenable number.

42497793 is a deficient number, since it is larger than the sum of its proper divisors (25403495).

42497793 is a wasteful number, since it uses less digits than its factorization.

42497793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9873 (or 9870 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 42497793 is about 6519.0331338320. The cubic root of 42497793 is about 348.9705615243.

The spelling of 42497793 in words is "forty-two million, four hundred ninety-seven thousand, seven hundred ninety-three".