424123109 has 2 divisors, whose sum is σ = 424123110. Its totient is φ = 424123108.

The previous prime is 424123103. The next prime is 424123129. The reversal of 424123109 is 901321424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404894884 + 19228225 = 20122^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424123109 is a prime.

It is equal to p_22552154 and since 424123109 and 22552154 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424123103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212061554 + 212061555.

It is an arithmetic number, because the mean of its divisors is an integer number (212061555).

Almost surely, 2^424123109 is an apocalyptic number.

It is an amenable number.

424123109 is a deficient number, since it is larger than the sum of its proper divisors (1).

424123109 is an equidigital number, since it uses as much as digits as its factorization.

424123109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 424123109 is about 20594.2494157957. The cubic root of 424123109 is about 751.3298533339.

The spelling of 424123109 in words is "four hundred twenty-four million, one hundred twenty-three thousand, one hundred nine".