5171721007 has 4 divisors (see below), whose sum is σ = 5180158360. Its totient is φ = 5163283656.

The previous prime is 5171721001. The next prime is 5171721019. The reversal of 5171721007 is 7001271715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5171721007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5171721007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5171721001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217757 + ... + 4218982.

It is an arithmetic number, because the mean of its divisors is an integer number (1295039590).

Almost surely, 2^5171721007 is an apocalyptic number.

5171721007 is a deficient number, since it is larger than the sum of its proper divisors (8437353).

5171721007 is an equidigital number, since it uses as much as digits as its factorization.

5171721007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437352.

The product of its (nonzero) digits is 3430, while the sum is 31.

The square root of 5171721007 is about 71914.6786615918. The cubic root of 5171721007 is about 1729.3319401451.

The spelling of 5171721007 in words is "five billion, one hundred seventy-one million, seven hundred twenty-one thousand, seven".