13920997 has 2 divisors, whose sum is σ = 13920998. Its totient is φ = 13920996.

The previous prime is 13920979. The next prime is 13921001. The reversal of 13920997 is 79902931.

13920997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (13920979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 1852321 = 3474^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 13920997 - 2²³ = 5532389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13920937) 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, 6960498 + 6960499.

It is an arithmetic number, because the mean of its divisors is an integer number (6960499).

Almost surely, 2^13920997 is an apocalyptic number.

It is an amenable number.

13920997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13920997 is an equidigital number, since it uses as much as digits as its factorization.

13920997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 13920997 is about 3731.0852308678. The cubic root of 13920997 is about 240.5600174669.

The spelling of 13920997 in words is "thirteen million, nine hundred twenty thousand, nine hundred ninety-seven".