423123081533 has 2 divisors, whose sum is σ = 423123081534. Its totient is φ = 423123081532.

The previous prime is 423123081517. The next prime is 423123081539. The reversal of 423123081533 is 335180321324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398177406169 + 24945675364 = 631013^2 + 157942^2 .

It is a cyclic number.

It is not a de Polignac number, because 423123081533 - 2⁴ = 423123081517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423123081493 and 423123081502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423123081539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211561540766 + 211561540767.

It is an arithmetic number, because the mean of its divisors is an integer number (211561540767).

Almost surely, 2^423123081533 is an apocalyptic number.

It is an amenable number.

423123081533 is a deficient number, since it is larger than the sum of its proper divisors (1).

423123081533 is an equidigital number, since it uses as much as digits as its factorization.

423123081533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 423123081533 in words is "four hundred twenty-three billion, one hundred twenty-three million, eighty-one thousand, five hundred thirty-three".