13119947 has 4 divisors (see below), whose sum is σ = 13188120. Its totient is φ = 13051776.

The previous prime is 13119943. The next prime is 13119961. The reversal of 13119947 is 74991131.

It is a happy number.

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 13119947 - 2² = 13119943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13119943) 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 3 ways as a sum of consecutive naturals, for example, 33797 + ... + 34182.

It is an arithmetic number, because the mean of its divisors is an integer number (3297030).

Almost surely, 2^13119947 is an apocalyptic number.

13119947 is a deficient number, since it is larger than the sum of its proper divisors (68173).

13119947 is an equidigital number, since it uses as much as digits as its factorization.

13119947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68172.

The product of its digits is 6804, while the sum is 35.

The square root of 13119947 is about 3622.1467391590. The cubic root of 13119947 is about 235.8544240094.

The spelling of 13119947 in words is "thirteen million, one hundred nineteen thousand, nine hundred forty-seven".