423508538513 has 2 divisors, whose sum is σ = 423508538514. Its totient is φ = 423508538512.

The previous prime is 423508538471. The next prime is 423508538527. The reversal of 423508538513 is 315835805324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271308682129 + 152199856384 = 520873^2 + 390128^2 .

It is a cyclic number.

It is not a de Polignac number, because 423508538513 - 2¹⁰ = 423508537489 is a prime.

It is not a weakly prime, because it can be changed into another prime (423508538113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211754269256 + 211754269257.

It is an arithmetic number, because the mean of its divisors is an integer number (211754269257).

Almost surely, 2^423508538513 is an apocalyptic number.

It is an amenable number.

423508538513 is a deficient number, since it is larger than the sum of its proper divisors (1).

423508538513 is an equidigital number, since it uses as much as digits as its factorization.

423508538513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 423508538513 in words is "four hundred twenty-three billion, five hundred eight million, five hundred thirty-eight thousand, five hundred thirteen".