423421043237 has 2 divisors, whose sum is σ = 423421043238. Its totient is φ = 423421043236.

The previous prime is 423421043203. The next prime is 423421043251. The reversal of 423421043237 is 732340124324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216751700356 + 206669342881 = 465566^2 + 454609^2 .

It is a cyclic number.

It is not a de Polignac number, because 423421043237 - 2⁸ = 423421042981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423421043197 and 423421043206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423421043267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211710521618 + 211710521619.

It is an arithmetic number, because the mean of its divisors is an integer number (211710521619).

Almost surely, 2^423421043237 is an apocalyptic number.

It is an amenable number.

423421043237 is a deficient number, since it is larger than the sum of its proper divisors (1).

423421043237 is an equidigital number, since it uses as much as digits as its factorization.

423421043237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 35.

The spelling of 423421043237 in words is "four hundred twenty-three billion, four hundred twenty-one million, forty-three thousand, two hundred thirty-seven".