13279563 has 24 divisors (see below), whose sum is σ = 21605376. Its totient is φ = 7786800.

The previous prime is 13279549. The next prime is 13279571. The reversal of 13279563 is 36597231.

It is not a de Polignac number, because 13279563 - 2¹⁶ = 13214027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13279583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 906 + ... + 5232.

It is an arithmetic number, because the mean of its divisors is an integer number (900224).

Almost surely, 2^13279563 is an apocalyptic number.

13279563 is a deficient number, since it is larger than the sum of its proper divisors (8325813).

13279563 is a wasteful number, since it uses less digits than its factorization.

13279563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375 (or 4372 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 13279563 is about 3644.1134724374. The cubic root of 13279563 is about 236.8070319447.

The spelling of 13279563 in words is "thirteen million, two hundred seventy-nine thousand, five hundred sixty-three".