13187973 has 8 divisors (see below), whose sum is σ = 17601408. Its totient is φ = 8783264.

The previous prime is 13187969. The next prime is 13187981. The reversal of 13187973 is 37978131.

It is a happy number.

13187973 is digitally balanced in base 2 and base 4, because in such bases 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 13187973 - 2² = 13187969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13187983) 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, 3361 + ... + 6137.

It is an arithmetic number, because the mean of its divisors is an integer number (2200176).

Almost surely, 2^13187973 is an apocalyptic number.

It is an amenable number.

13187973 is a deficient number, since it is larger than the sum of its proper divisors (4413435).

13187973 is a wasteful number, since it uses less digits than its factorization.

13187973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363.

The product of its digits is 31752, while the sum is 39.

The square root of 13187973 is about 3631.5248863253. The cubic root of 13187973 is about 236.2613510405.

The spelling of 13187973 in words is "thirteen million, one hundred eighty-seven thousand, nine hundred seventy-three".