42315893 has 2 divisors, whose sum is σ = 42315894. Its totient is φ = 42315892.

The previous prime is 42315877. The next prime is 42315943. The reversal of 42315893 is 39851324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 7941124 = 5863^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 42315893 - 2⁴ = 42315877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42315293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21157946 + 21157947.

It is an arithmetic number, because the mean of its divisors is an integer number (21157947).

Almost surely, 2^42315893 is an apocalyptic number.

It is an amenable number.

42315893 is a deficient number, since it is larger than the sum of its proper divisors (1).

42315893 is an equidigital number, since it uses as much as digits as its factorization.

42315893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 42315893 is about 6505.0667175672. The cubic root of 42315893 is about 348.4719589467.

The spelling of 42315893 in words is "forty-two million, three hundred fifteen thousand, eight hundred ninety-three".