42635893 has 2 divisors, whose sum is σ = 42635894. Its totient is φ = 42635892.

The previous prime is 42635891. The next prime is 42635899. The reversal of 42635893 is 39853624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41899729 + 736164 = 6473^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 42635893 - 2¹ = 42635891 is a prime.

Together with 42635891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42635891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21317946 + 21317947.

It is an arithmetic number, because the mean of its divisors is an integer number (21317947).

Almost surely, 2^42635893 is an apocalyptic number.

It is an amenable number.

42635893 is a deficient number, since it is larger than the sum of its proper divisors (1).

42635893 is an equidigital number, since it uses as much as digits as its factorization.

42635893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 42635893 is about 6529.6166043651. The cubic root of 42635893 is about 349.3481554574.

The spelling of 42635893 in words is "forty-two million, six hundred thirty-five thousand, eight hundred ninety-three".