423744121 has 2 divisors, whose sum is σ = 423744122. Its totient is φ = 423744120.

The previous prime is 423744067. The next prime is 423744127. The reversal of 423744121 is 121447324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282609721 + 141134400 = 16811^2 + 11880^2 .

It is a cyclic number.

It is not a de Polignac number, because 423744121 - 2⁹ = 423743609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423744121.

It is not a weakly prime, because it can be changed into another prime (423744127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211872060 + 211872061.

It is an arithmetic number, because the mean of its divisors is an integer number (211872061).

Almost surely, 2^423744121 is an apocalyptic number.

It is an amenable number.

423744121 is a deficient number, since it is larger than the sum of its proper divisors (1).

423744121 is an equidigital number, since it uses as much as digits as its factorization.

423744121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 423744121 is about 20585.0460528997. The cubic root of 423744121 is about 751.1059954895.

The spelling of 423744121 in words is "four hundred twenty-three million, seven hundred forty-four thousand, one hundred twenty-one".