13280939 has 4 divisors (see below), whose sum is σ = 15178224. Its totient is φ = 11383656.

The previous prime is 13280933. The next prime is 13280951. The reversal of 13280939 is 93908231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13280939 - 2¹² = 13276843 is a prime.

It is a super-4 number, since 4×13280939⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13280899 and 13280908.

It is not an unprimeable number, because it can be changed into a prime (13280933) 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 in 3 ways as a sum of consecutive naturals, for example, 948632 + ... + 948645.

It is an arithmetic number, because the mean of its divisors is an integer number (3794556).

Almost surely, 2^13280939 is an apocalyptic number.

13280939 is a deficient number, since it is larger than the sum of its proper divisors (1897285).

13280939 is an equidigital number, since it uses as much as digits as its factorization.

13280939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897284.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 13280939 is about 3644.3022651805. The cubic root of 13280939 is about 236.8152108088.

The spelling of 13280939 in words is "thirteen million, two hundred eighty thousand, nine hundred thirty-nine".