42813893 has 2 divisors, whose sum is σ = 42813894. Its totient is φ = 42813892.

The previous prime is 42813863. The next prime is 42813917. The reversal of 42813893 is 39831824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 16129 = 6542^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 42813893 - 2⁶ = 42813829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42813863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21406946 + 21406947.

It is an arithmetic number, because the mean of its divisors is an integer number (21406947).

Almost surely, 2^42813893 is an apocalyptic number.

It is an amenable number.

42813893 is a deficient number, since it is larger than the sum of its proper divisors (1).

42813893 is an equidigital number, since it uses as much as digits as its factorization.

42813893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 42813893 is about 6543.2326108736. The cubic root of 42813893 is about 349.8336433914.

The spelling of 42813893 in words is "forty-two million, eight hundred thirteen thousand, eight hundred ninety-three".