13317972 has 24 divisors (see below), whose sum is σ = 32078592. Its totient is φ = 4296000.

The previous prime is 13317971. The next prime is 13317977. The reversal of 13317972 is 27971331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13317971) 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 7 ways as a sum of consecutive naturals, for example, 17529 + ... + 18272.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608).

Almost surely, 2^13317972 is an apocalyptic number.

13317972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13317972 is an abundant number, since it is smaller than the sum of its proper divisors (18760620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13317972 is a wasteful number, since it uses less digits than its factorization.

13317972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35839 (or 35837 counting only the distinct ones).

The product of its digits is 7938, while the sum is 33.

The square root of 13317972 is about 3649.3796733144. The cubic root of 13317972 is about 237.0351209324.

The spelling of 13317972 in words is "thirteen million, three hundred seventeen thousand, nine hundred seventy-two".