1721482349 has 4 divisors (see below), whose sum is σ = 1721890620. Its totient is φ = 1721074080.

The previous prime is 1721482337. The next prime is 1721482379. The reversal of 1721482349 is 9432841271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1689785449 + 31696900 = 41107^2 + 5630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1721482349 - 2⁸ = 1721482093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721482379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197744 + ... + 206265.

It is an arithmetic number, because the mean of its divisors is an integer number (430472655).

Almost surely, 2^1721482349 is an apocalyptic number.

It is an amenable number.

1721482349 is a deficient number, since it is larger than the sum of its proper divisors (408271).

1721482349 is an equidigital number, since it uses as much as digits as its factorization.

1721482349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408270.

The product of its digits is 96768, while the sum is 41.

The square root of 1721482349 is about 41490.7501619337. The cubic root of 1721482349 is about 1198.4893836539.

The spelling of 1721482349 in words is "one billion, seven hundred twenty-one million, four hundred eighty-two thousand, three hundred forty-nine".