1721487353 has 2 divisors, whose sum is σ = 1721487354. Its totient is φ = 1721487352.

The previous prime is 1721487331. The next prime is 1721487367. The reversal of 1721487353 is 3537841271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1419179584 + 302307769 = 37672^2 + 17387^2 .

It is an emirp because it is prime and its reverse (3537841271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1721487353 - 2¹⁰ = 1721486329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1721487353.

It is not a weakly prime, because it can be changed into another prime (1721487553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860743676 + 860743677.

It is an arithmetic number, because the mean of its divisors is an integer number (860743677).

Almost surely, 2^1721487353 is an apocalyptic number.

It is an amenable number.

1721487353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721487353 is an equidigital number, since it uses as much as digits as its factorization.

1721487353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 1721487353 is about 41490.8104644872. The cubic root of 1721487353 is about 1198.4905449080.

The spelling of 1721487353 in words is "one billion, seven hundred twenty-one million, four hundred eighty-seven thousand, three hundred fifty-three".