42400323109 has 2 divisors, whose sum is σ = 42400323110. Its totient is φ = 42400323108.

The previous prime is 42400323073. The next prime is 42400323127. The reversal of 42400323109 is 90132300424.

42400323109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40301767009 + 2098556100 = 200753^2 + 45810^2 .

It is a cyclic number.

It is not a de Polignac number, because 42400323109 - 2²¹ = 42398225957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42400323209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200161554 + 21200161555.

It is an arithmetic number, because the mean of its divisors is an integer number (21200161555).

Almost surely, 2^42400323109 is an apocalyptic number.

It is an amenable number.

42400323109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400323109 is an equidigital number, since it uses as much as digits as its factorization.

42400323109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 42400323109 in words is "forty-two billion, four hundred million, three hundred twenty-three thousand, one hundred nine".