131321417 has 2 divisors, whose sum is σ = 131321418. Its totient is φ = 131321416.

The previous prime is 131321389. The next prime is 131321419. The reversal of 131321417 is 714123131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 63027721 = 8264^2 + 7939^2 .

It is a cyclic number.

It is not a de Polignac number, because 131321417 - 2⁶ = 131321353 is a prime.

Together with 131321419, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131321392 and 131321401.

It is not a weakly prime, because it can be changed into another prime (131321419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660708 + 65660709.

It is an arithmetic number, because the mean of its divisors is an integer number (65660709).

Almost surely, 2^131321417 is an apocalyptic number.

It is an amenable number.

131321417 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321417 is an equidigital number, since it uses as much as digits as its factorization.

131321417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 131321417 is about 11459.5557069199. Note that the first 3 decimals coincide. The cubic root of 131321417 is about 508.2903369050.

Adding to 131321417 its reverse (714123131), we get a palindrome (845444548).

The spelling of 131321417 in words is "one hundred thirty-one million, three hundred twenty-one thousand, four hundred seventeen".