103521317 has 2 divisors, whose sum is σ = 103521318. Its totient is φ = 103521316.

The previous prime is 103521293. The next prime is 103521343. The reversal of 103521317 is 713125301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 5134756 = 9919^2 + 2266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103521317 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 103521292 and 103521301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103521377) 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 as a sum of consecutive naturals, namely, 51760658 + 51760659.

It is an arithmetic number, because the mean of its divisors is an integer number (51760659).

Almost surely, 2^103521317 is an apocalyptic number.

It is an amenable number.

103521317 is a deficient number, since it is larger than the sum of its proper divisors (1).

103521317 is an equidigital number, since it uses as much as digits as its factorization.

103521317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 103521317 is about 10174.5425941415. The cubic root of 103521317 is about 469.5443252194.

Adding to 103521317 its reverse (713125301), we get a palindrome (816646618).

The spelling of 103521317 in words is "one hundred three million, five hundred twenty-one thousand, three hundred seventeen".