1721313147 has 8 divisors (see below), whose sum is σ = 2329339456. Its totient is φ = 1130414472.

The previous prime is 1721313131. The next prime is 1721313193. The reversal of 1721313147 is 7413131271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1721313147 - 2⁴ = 1721313131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1721313107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281673 + ... + 4282074.

It is an arithmetic number, because the mean of its divisors is an integer number (291167432).

Almost surely, 2^1721313147 is an apocalyptic number.

1721313147 is a deficient number, since it is larger than the sum of its proper divisors (608026309).

1721313147 is an equidigital number, since it uses as much as digits as its factorization.

1721313147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563817.

The product of its digits is 3528, while the sum is 30.

The square root of 1721313147 is about 41488.7110790393. The cubic root of 1721313147 is about 1198.4501164404.

The spelling of 1721313147 in words is "one billion, seven hundred twenty-one million, three hundred thirteen thousand, one hundred forty-seven".