13422139 has 2 divisors, whose sum is σ = 13422140. Its totient is φ = 13422138.

The previous prime is 13422137. The next prime is 13422169. The reversal of 13422139 is 93122431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13422139 - 2¹ = 13422137 is a prime.

Together with 13422137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13422131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6711069 + 6711070.

It is an arithmetic number, because the mean of its divisors is an integer number (6711070).

Almost surely, 2^13422139 is an apocalyptic number.

13422139 is a deficient number, since it is larger than the sum of its proper divisors (1).

13422139 is an equidigital number, since it uses as much as digits as its factorization.

13422139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 13422139 is about 3663.6237525161. The cubic root of 13422139 is about 237.6515096050.

It can be divided in two parts, 1342 and 2139, that added together give a square (3481 = 59²).

The spelling of 13422139 in words is "thirteen million, four hundred twenty-two thousand, one hundred thirty-nine".