201423421439 has 2 divisors, whose sum is σ = 201423421440. Its totient is φ = 201423421438.

The previous prime is 201423421429. The next prime is 201423421499. The reversal of 201423421439 is 934124324102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201423421439 - 2⁸ = 201423421183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201423421399 and 201423421408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201423421429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100711710719 + 100711710720.

It is an arithmetic number, because the mean of its divisors is an integer number (100711710720).

Almost surely, 2^201423421439 is an apocalyptic number.

201423421439 is a deficient number, since it is larger than the sum of its proper divisors (1).

201423421439 is an equidigital number, since it uses as much as digits as its factorization.

201423421439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 201423421439 in words is "two hundred one billion, four hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-nine".