12870991949 has 2 divisors, whose sum is σ = 12870991950. Its totient is φ = 12870991948.

The previous prime is 12870991891. The next prime is 12870991963. The reversal of 12870991949 is 94919907821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10856598025 + 2014393924 = 104195^2 + 44882^2 .

It is a cyclic number.

It is not a de Polignac number, because 12870991949 - 2¹⁶ = 12870926413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12870991999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6435495974 + 6435495975.

It is an arithmetic number, because the mean of its divisors is an integer number (6435495975).

Almost surely, 2^12870991949 is an apocalyptic number.

It is an amenable number.

12870991949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12870991949 is an equidigital number, since it uses as much as digits as its factorization.

12870991949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The spelling of 12870991949 in words is "twelve billion, eight hundred seventy million, nine hundred ninety-one thousand, nine hundred forty-nine".