11969813 has 8 divisors (see below), whose sum is σ = 12481536. Its totient is φ = 11466000.

The previous prime is 11969807. The next prime is 11969851. The reversal of 11969813 is 31896911.

11969813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11969813 - 2⁸ = 11969557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11969803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220 + ... + 5042.

It is an arithmetic number, because the mean of its divisors is an integer number (1560192).

Almost surely, 2^11969813 is an apocalyptic number.

It is an amenable number.

11969813 is a deficient number, since it is larger than the sum of its proper divisors (511723).

11969813 is a wasteful number, since it uses less digits than its factorization.

11969813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its digits is 11664, while the sum is 38.

The square root of 11969813 is about 3459.7417533683. The cubic root of 11969813 is about 228.7507123710.

The spelling of 11969813 in words is "eleven million, nine hundred sixty-nine thousand, eight hundred thirteen".