13870979 has 2 divisors, whose sum is σ = 13870980. Its totient is φ = 13870978.

The previous prime is 13870951. The next prime is 13871023. The reversal of 13870979 is 97907831.

It is an a-pointer prime, because the next prime (13871023) can be obtained adding 13870979 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13870979 - 2¹⁶ = 13805443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13870939) 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, 6935489 + 6935490.

It is an arithmetic number, because the mean of its divisors is an integer number (6935490).

Almost surely, 2^13870979 is an apocalyptic number.

13870979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13870979 is an equidigital number, since it uses as much as digits as its factorization.

13870979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 13870979 is about 3724.3763236279. The cubic root of 13870979 is about 240.2715618228.

It can be divided in two parts, 138 and 70979, that added together give a palindrome (71117).

The spelling of 13870979 in words is "thirteen million, eight hundred seventy thousand, nine hundred seventy-nine".