12979591 has 2 divisors, whose sum is σ = 12979592. Its totient is φ = 12979590.

The previous prime is 12979583. The next prime is 12979597. The reversal of 12979591 is 19597921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12979591 - 2³ = 12979583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12979597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489795 + 6489796.

It is an arithmetic number, because the mean of its divisors is an integer number (6489796).

Almost surely, 2^12979591 is an apocalyptic number.

12979591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12979591 is an equidigital number, since it uses as much as digits as its factorization.

12979591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 43.

The square root of 12979591 is about 3602.7199447084. The cubic root of 12979591 is about 235.0103571714.

The spelling of 12979591 in words is "twelve million, nine hundred seventy-nine thousand, five hundred ninety-one".