13999481 has 2 divisors, whose sum is σ = 13999482. Its totient is φ = 13999480.

The previous prime is 13999477. The next prime is 13999519. The reversal of 13999481 is 18499931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 11881 = 3740^2 + 109^2 .

It is an emirp because it is prime and its reverse (18499931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13999481 - 2² = 13999477 is a prime.

It is a super-2 number, since 2×13999481² = 391970936538722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13999421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6999740 + 6999741.

It is an arithmetic number, because the mean of its divisors is an integer number (6999741).

Almost surely, 2^13999481 is an apocalyptic number.

It is an amenable number.

13999481 is a deficient number, since it is larger than the sum of its proper divisors (1).

13999481 is an equidigital number, since it uses as much as digits as its factorization.

13999481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 13999481 is about 3741.5880318389. The cubic root of 13999481 is about 241.0112481335.

The spelling of 13999481 in words is "thirteen million, nine hundred ninety-nine thousand, four hundred eighty-one".