13487993 has 2 divisors, whose sum is σ = 13487994. Its totient is φ = 13487992.

The previous prime is 13487983. The next prime is 13488001. The reversal of 13487993 is 39978431.

It is a happy number.

13487993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7689529 + 5798464 = 2773^2 + 2408^2 .

It is a cyclic number.

It is not a de Polignac number, because 13487993 - 2⁴ = 13487977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13487923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6743996 + 6743997.

It is an arithmetic number, because the mean of its divisors is an integer number (6743997).

Almost surely, 2^13487993 is an apocalyptic number.

It is an amenable number.

13487993 is a deficient number, since it is larger than the sum of its proper divisors (1).

13487993 is an equidigital number, since it uses as much as digits as its factorization.

13487993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 13487993 is about 3672.6003049611. The cubic root of 13487993 is about 238.0395445437.

The spelling of 13487993 in words is "thirteen million, four hundred eighty-seven thousand, nine hundred ninety-three".