423742869256361 has 2 divisors, whose sum is σ = 423742869256362. Its totient is φ = 423742869256360.

The previous prime is 423742869256307. The next prime is 423742869256363. The reversal of 423742869256361 is 163652968247324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238780992451600 + 184961876804761 = 15452540^2 + 13600069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423742869256361 is a prime.

It is a super-2 number, since 2×423742869256361² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 423742869256363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423742869256291 and 423742869256300.

It is not a weakly prime, because it can be changed into another prime (423742869256363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211871434628180 + 211871434628181.

It is an arithmetic number, because the mean of its divisors is an integer number (211871434628181).

Almost surely, 2^{423742869256361} is an apocalyptic number.

It is an amenable number.

423742869256361 is a deficient number, since it is larger than the sum of its proper divisors (1).

423742869256361 is an equidigital number, since it uses as much as digits as its factorization.

423742869256361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627056640, while the sum is 68.

The spelling of 423742869256361 in words is "four hundred twenty-three trillion, seven hundred forty-two billion, eight hundred sixty-nine million, two hundred fifty-six thousand, three hundred sixty-one".