13399081 has 2 divisors, whose sum is σ = 13399082. Its totient is φ = 13399080.

The previous prime is 13399079. The next prime is 13399093. The reversal of 13399081 is 18099331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 3481 = 3660^2 + 59^2 .

It is an emirp because it is prime and its reverse (18099331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13399081 - 2¹ = 13399079 is a prime.

It is a super-2 number, since 2×13399081² = 359070743289122, which contains 22 as substring.

Together with 13399079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13399021) 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, 6699540 + 6699541.

It is an arithmetic number, because the mean of its divisors is an integer number (6699541).

Almost surely, 2^13399081 is an apocalyptic number.

It is an amenable number.

13399081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13399081 is an equidigital number, since it uses as much as digits as its factorization.

13399081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 13399081 is about 3660.4755155581. The cubic root of 13399081 is about 237.5153437917.

The spelling of 13399081 in words is "thirteen million, three hundred ninety-nine thousand, eighty-one".