13027991 has 2 divisors, whose sum is σ = 13027992. Its totient is φ = 13027990.

The previous prime is 13027981. The next prime is 13027997. The reversal of 13027991 is 19972031.

It is a happy number.

13027991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13027991 - 2¹⁰ = 13026967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13027997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6513995 + 6513996.

It is an arithmetic number, because the mean of its divisors is an integer number (6513996).

Almost surely, 2^13027991 is an apocalyptic number.

13027991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13027991 is an equidigital number, since it uses as much as digits as its factorization.

13027991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 13027991 is about 3609.4308415594. The cubic root of 13027991 is about 235.3021073059.

The spelling of 13027991 in words is "thirteen million, twenty-seven thousand, nine hundred ninety-one".