13642879 has 2 divisors, whose sum is σ = 13642880. Its totient is φ = 13642878.

The previous prime is 13642859. The next prime is 13642901. The reversal of 13642879 is 97824631.

It is a weak prime.

It is an emirp because it is prime and its reverse (97824631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13642879 - 2¹¹ = 13640831 is a prime.

It is a super-2 number, since 2×13642879² = 372256294817282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13642859) 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, 6821439 + 6821440.

It is an arithmetic number, because the mean of its divisors is an integer number (6821440).

Almost surely, 2^13642879 is an apocalyptic number.

13642879 is a deficient number, since it is larger than the sum of its proper divisors (1).

13642879 is an equidigital number, since it uses as much as digits as its factorization.

13642879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 13642879 is about 3693.6268084364. The cubic root of 13642879 is about 238.9472348401.

The spelling of 13642879 in words is "thirteen million, six hundred forty-two thousand, eight hundred seventy-nine".