13921373 has 2 divisors, whose sum is σ = 13921374. Its totient is φ = 13921372.

The previous prime is 13921333. The next prime is 13921403. The reversal of 13921373 is 37312931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12376324 + 1545049 = 3518^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 13921373 - 2¹⁰ = 13920349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13921333) 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, 6960686 + 6960687.

It is an arithmetic number, because the mean of its divisors is an integer number (6960687).

Almost surely, 2^13921373 is an apocalyptic number.

It is an amenable number.

13921373 is a deficient number, since it is larger than the sum of its proper divisors (1).

13921373 is an equidigital number, since it uses as much as digits as its factorization.

13921373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 29.

The square root of 13921373 is about 3731.1356180123. The cubic root of 13921373 is about 240.5621832541.

It can be divided in two parts, 139 and 21373, that added together give a palindrome (21512).

The spelling of 13921373 in words is "thirteen million, nine hundred twenty-one thousand, three hundred seventy-three".