1721171053 has 4 divisors (see below), whose sum is σ = 1967052640. Its totient is φ = 1475289468.

The previous prime is 1721171051. The next prime is 1721171063. The reversal of 1721171053 is 3501711271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1721171053 - 2¹ = 1721171051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721171051) 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, 122940783 + ... + 122940796.

It is an arithmetic number, because the mean of its divisors is an integer number (491763160).

Almost surely, 2^1721171053 is an apocalyptic number.

It is an amenable number.

1721171053 is a deficient number, since it is larger than the sum of its proper divisors (245881587).

1721171053 is an equidigital number, since it uses as much as digits as its factorization.

1721171053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245881586.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 1721171053 is about 41486.9986019717. The cubic root of 1721171053 is about 1198.4171382734.

The spelling of 1721171053 in words is "one billion, seven hundred twenty-one million, one hundred seventy-one thousand, fifty-three".