1716728953 has 4 divisors (see below), whose sum is σ = 1716851700. Its totient is φ = 1716606208.

The previous prime is 1716728939. The next prime is 1716728987. The reversal of 1716728953 is 3598276171.

It is a happy number.

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 1388829289 + 327899664 = 37267^2 + 18108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1716728953 - 2²⁹ = 1179858041 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1716728897 and 1716728906.

It is not an unprimeable number, because it can be changed into a prime (1716228953) 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, 37228 + ... + 69421.

It is an arithmetic number, because the mean of its divisors is an integer number (429212925).

Almost surely, 2^1716728953 is an apocalyptic number.

It is an amenable number.

1716728953 is a deficient number, since it is larger than the sum of its proper divisors (122747).

1716728953 is a wasteful number, since it uses less digits than its factorization.

1716728953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122746.

The product of its digits is 635040, while the sum is 49.

The square root of 1716728953 is about 41433.4279658345. The cubic root of 1716728953 is about 1197.3852681284.

It can be divided in two parts, 171672 and 8953, that added together give a square (180625 = 425²).

The spelling of 1716728953 in words is "one billion, seven hundred sixteen million, seven hundred twenty-eight thousand, nine hundred fifty-three".