42440093 has 2 divisors, whose sum is σ = 42440094. Its totient is φ = 42440092.

The previous prime is 42440077. The next prime is 42440113. The reversal of 42440093 is 39004424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36024004 + 6416089 = 6002^2 + 2533^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440093 - 2⁴ = 42440077 is a prime.

It is a super-2 number, since 2×42440093² = 3602322987697298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220046 + 21220047.

It is an arithmetic number, because the mean of its divisors is an integer number (21220047).

Almost surely, 2^42440093 is an apocalyptic number.

It is an amenable number.

42440093 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440093 is an equidigital number, since it uses as much as digits as its factorization.

42440093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 42440093 is about 6514.6061277717. The cubic root of 42440093 is about 348.8125555066.

The spelling of 42440093 in words is "forty-two million, four hundred forty thousand, ninety-three".