13131667 has 4 divisors (see below), whose sum is σ = 13904136. Its totient is φ = 12359200.

The previous prime is 13131661. The next prime is 13131719. The reversal of 13131667 is 76613131.

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 13131667 - 2¹⁹ = 12607379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131661) 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 3 ways as a sum of consecutive naturals, for example, 386209 + ... + 386242.

It is an arithmetic number, because the mean of its divisors is an integer number (3476034).

Almost surely, 2^13131667 is an apocalyptic number.

13131667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13131667 is a deficient number, since it is larger than the sum of its proper divisors (772469).

13131667 is an equidigital number, since it uses as much as digits as its factorization.

13131667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772468.

The product of its digits is 2268, while the sum is 28.

The square root of 13131667 is about 3623.7642031457. The cubic root of 13131667 is about 235.9246324020.

Adding to 13131667 its reverse (76613131), we get a palindrome (89744798).

The spelling of 13131667 in words is "thirteen million, one hundred thirty-one thousand, six hundred sixty-seven".