42040993 has 2 divisors, whose sum is σ = 42040994. Its totient is φ = 42040992.

The previous prime is 42040979. The next prime is 42041011. The reversal of 42040993 is 39904024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29030544 + 13010449 = 5388^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 42040993 - 2⁵ = 42040961 is a prime.

It is not a weakly prime, because it can be changed into another prime (42040963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020496 + 21020497.

It is an arithmetic number, because the mean of its divisors is an integer number (21020497).

Almost surely, 2^42040993 is an apocalyptic number.

It is an amenable number.

42040993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040993 is an equidigital number, since it uses as much as digits as its factorization.

42040993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42040993 is about 6483.9026056843. The cubic root of 42040993 is about 347.7157172082.

The spelling of 42040993 in words is "forty-two million, forty thousand, nine hundred ninety-three".