14639881 has 2 divisors, whose sum is σ = 14639882. Its totient is φ = 14639880.

The previous prime is 14639857. The next prime is 14639893. The reversal of 14639881 is 18893641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 7241481 = 2720^2 + 2691^2 .

It is a cyclic number.

It is not a de Polignac number, because 14639881 - 2¹⁵ = 14607113 is a prime.

It is a super-4 number, since 4×14639881⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (14639851) 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, 7319940 + 7319941.

It is an arithmetic number, because the mean of its divisors is an integer number (7319941).

Almost surely, 2^14639881 is an apocalyptic number.

It is an amenable number.

14639881 is a deficient number, since it is larger than the sum of its proper divisors (1).

14639881 is an equidigital number, since it uses as much as digits as its factorization.

14639881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 14639881 is about 3826.2097433361. The cubic root of 14639881 is about 244.6315773127.

The spelling of 14639881 in words is "fourteen million, six hundred thirty-nine thousand, eight hundred eighty-one".