12423319957 has 2 divisors, whose sum is σ = 12423319958. Its totient is φ = 12423319956.

The previous prime is 12423319949. The next prime is 12423320009. The reversal of 12423319957 is 75991332421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11092091761 + 1331228196 = 105319^2 + 36486^2 .

It is an emirp because it is prime and its reverse (75991332421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12423319957 - 2³ = 12423319949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12423319907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211659978 + 6211659979.

It is an arithmetic number, because the mean of its divisors is an integer number (6211659979).

Almost surely, 2^12423319957 is an apocalyptic number.

It is an amenable number.

12423319957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12423319957 is an equidigital number, since it uses as much as digits as its factorization.

12423319957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The spelling of 12423319957 in words is "twelve billion, four hundred twenty-three million, three hundred nineteen thousand, nine hundred fifty-seven".