423003261509 has 2 divisors, whose sum is σ = 423003261510. Its totient is φ = 423003261508.

The previous prime is 423003261451. The next prime is 423003261521. The reversal of 423003261509 is 905162300324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391598105284 + 31405156225 = 625778^2 + 177215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423003261509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423003261589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211501630754 + 211501630755.

It is an arithmetic number, because the mean of its divisors is an integer number (211501630755).

Almost surely, 2^423003261509 is an apocalyptic number.

It is an amenable number.

423003261509 is a deficient number, since it is larger than the sum of its proper divisors (1).

423003261509 is an equidigital number, since it uses as much as digits as its factorization.

423003261509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 423003261509 in words is "four hundred twenty-three billion, three million, two hundred sixty-one thousand, five hundred nine".