1423121317 has 2 divisors, whose sum is σ = 1423121318. Its totient is φ = 1423121316.

The previous prime is 1423121311. The next prime is 1423121351. The reversal of 1423121317 is 7131213241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274061636 + 149059681 = 35694^2 + 12209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423121317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1423121291 and 1423121300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423121311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711560658 + 711560659.

It is an arithmetic number, because the mean of its divisors is an integer number (711560659).

Almost surely, 2^1423121317 is an apocalyptic number.

It is an amenable number.

1423121317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423121317 is an equidigital number, since it uses as much as digits as its factorization.

1423121317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 1423121317 is about 37724.2802051941. The cubic root of 1423121317 is about 1124.8138139947.

Adding to 1423121317 its reverse (7131213241), we get a palindrome (8554334558).

The spelling of 1423121317 in words is "one billion, four hundred twenty-three million, one hundred twenty-one thousand, three hundred seventeen".