13454989 has 2 divisors, whose sum is σ = 13454990. Its totient is φ = 13454988.

The previous prime is 13454981. The next prime is 13454999. The reversal of 13454989 is 98945431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13446889 + 8100 = 3667^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 13454989 - 2³ = 13454981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13454981) 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, 6727494 + 6727495.

It is an arithmetic number, because the mean of its divisors is an integer number (6727495).

Almost surely, 2^13454989 is an apocalyptic number.

It is an amenable number.

13454989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13454989 is an equidigital number, since it uses as much as digits as its factorization.

13454989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 13454989 is about 3668.1042787794. The cubic root of 13454989 is about 237.8452316285.

The spelling of 13454989 in words is "thirteen million, four hundred fifty-four thousand, nine hundred eighty-nine".