671965753 has 4 divisors (see below), whose sum is σ = 679516020. Its totient is φ = 664415488.

The previous prime is 671965751. The next prime is 671965781. The reversal of 671965753 is 357569176.

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 96589584 + 575376169 = 9828^2 + 23987^2 .

It is a cyclic number.

It is not a de Polignac number, because 671965753 - 2¹ = 671965751 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 = 671965697 and 671965706.

It is not an unprimeable number, because it can be changed into a prime (671965751) 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, 3775000 + ... + 3775177.

It is an arithmetic number, because the mean of its divisors is an integer number (169879005).

Almost surely, 2^671965753 is an apocalyptic number.

It is an amenable number.

671965753 is a deficient number, since it is larger than the sum of its proper divisors (7550267).

671965753 is an equidigital number, since it uses as much as digits as its factorization.

671965753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550266.

The product of its digits is 1190700, while the sum is 49.

The square root of 671965753 is about 25922.3022318620. The cubic root of 671965753 is about 875.8889482216. Note that the first 3 decimals are identical.

The spelling of 671965753 in words is "six hundred seventy-one million, nine hundred sixty-five thousand, seven hundred fifty-three".