423440012203961 has 2 divisors, whose sum is σ = 423440012203962. Its totient is φ = 423440012203960.

The previous prime is 423440012203919. The next prime is 423440012203969. The reversal of 423440012203961 is 169302210044324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377692793862400 + 45747218341561 = 19434320^2 + 6763669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423440012203961 is a prime.

It is not a weakly prime, because it can be changed into another prime (423440012203969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211720006101980 + 211720006101981.

It is an arithmetic number, because the mean of its divisors is an integer number (211720006101981).

Almost surely, 2^{423440012203961} is an apocalyptic number.

It is an amenable number.

423440012203961 is a deficient number, since it is larger than the sum of its proper divisors (1).

423440012203961 is an equidigital number, since it uses as much as digits as its factorization.

423440012203961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 423440012203961 in words is "four hundred twenty-three trillion, four hundred forty billion, twelve million, two hundred three thousand, nine hundred sixty-one".