1713213521 has 2 divisors, whose sum is σ = 1713213522. Its totient is φ = 1713213520.

The previous prime is 1713213449. The next prime is 1713213529. The reversal of 1713213521 is 1253123171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878292496 + 834921025 = 29636^2 + 28895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1713213521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1713213529) 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, 856606760 + 856606761.

It is an arithmetic number, because the mean of its divisors is an integer number (856606761).

Almost surely, 2^1713213521 is an apocalyptic number.

It is an amenable number.

1713213521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1713213521 is an equidigital number, since it uses as much as digits as its factorization.

1713213521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 1713213521 is about 41390.9835713045. The cubic root of 1713213521 is about 1196.5673943128.

Adding to 1713213521 its reverse (1253123171), we get a palindrome (2966336692).

The spelling of 1713213521 in words is "one billion, seven hundred thirteen million, two hundred thirteen thousand, five hundred twenty-one".