13213969 has 4 divisors (see below), whose sum is σ = 13318144. Its totient is φ = 13109796.

The previous prime is 13213951. The next prime is 13213979. The reversal of 13213969 is 96931231.

13213969 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13213969 - 2⁷ = 13213841 is a prime.

It is a super-2 number, since 2×13213969² = 349217953465922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13213939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51897 + ... + 52150.

It is an arithmetic number, because the mean of its divisors is an integer number (3329536).

Almost surely, 2^13213969 is an apocalyptic number.

It is an amenable number.

13213969 is a deficient number, since it is larger than the sum of its proper divisors (104175).

13213969 is a wasteful number, since it uses less digits than its factorization.

13213969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104174.

The product of its digits is 8748, while the sum is 34.

The square root of 13213969 is about 3635.1023369363. The cubic root of 13213969 is about 236.4164878183.

The spelling of 13213969 in words is "thirteen million, two hundred thirteen thousand, nine hundred sixty-nine".