12453139949 has 2 divisors, whose sum is σ = 12453139950. Its totient is φ = 12453139948.

The previous prime is 12453139943. The next prime is 12453140003. The reversal of 12453139949 is 94993135421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11015971849 + 1437168100 = 104957^2 + 37910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12453139949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12453139897 and 12453139906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12453139943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6226569974 + 6226569975.

It is an arithmetic number, because the mean of its divisors is an integer number (6226569975).

Almost surely, 2^12453139949 is an apocalyptic number.

It is an amenable number.

12453139949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12453139949 is an equidigital number, since it uses as much as digits as its factorization.

12453139949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The spelling of 12453139949 in words is "twelve billion, four hundred fifty-three million, one hundred thirty-nine thousand, nine hundred forty-nine".