13143957 has 4 divisors (see below), whose sum is σ = 17525280. Its totient is φ = 8762636.

The previous prime is 13143943. The next prime is 13143959. The reversal of 13143957 is 75934131.

13143957 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 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 13143957 - 2¹⁰ = 13142933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143959) 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, 2190657 + ... + 2190662.

It is an arithmetic number, because the mean of its divisors is an integer number (4381320).

Almost surely, 2^13143957 is an apocalyptic number.

It is an amenable number.

13143957 is a deficient number, since it is larger than the sum of its proper divisors (4381323).

13143957 is an equidigital number, since it uses as much as digits as its factorization.

13143957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381322.

The product of its digits is 11340, while the sum is 33.

The square root of 13143957 is about 3625.4595570769. The cubic root of 13143957 is about 235.9982105102.

The spelling of 13143957 in words is "thirteen million, one hundred forty-three thousand, nine hundred fifty-seven".