12908754421 has 2 divisors, whose sum is σ = 12908754422. Its totient is φ = 12908754420.

The previous prime is 12908754401. The next prime is 12908754437. The reversal of 12908754421 is 12445780921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9353017521 + 3555736900 = 96711^2 + 59630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12908754421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12908754401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454377210 + 6454377211.

It is an arithmetic number, because the mean of its divisors is an integer number (6454377211).

Almost surely, 2^12908754421 is an apocalyptic number.

It is an amenable number.

12908754421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12908754421 is an equidigital number, since it uses as much as digits as its factorization.

12908754421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 12908754421 in words is "twelve billion, nine hundred eight million, seven hundred fifty-four thousand, four hundred twenty-one".