683195352491 has 4 divisors (see below), whose sum is σ = 684408843912. Its totient is φ = 681981861072.

The previous prime is 683195352409. The next prime is 683195352533. The reversal of 683195352491 is 194253591386.

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-683195352491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (683195352401) 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, 606744866 + ... + 606745991.

It is an arithmetic number, because the mean of its divisors is an integer number (171102210978).

Almost surely, 2^683195352491 is an apocalyptic number.

683195352491 is a deficient number, since it is larger than the sum of its proper divisors (1213491421).

683195352491 is a wasteful number, since it uses less digits than its factorization.

683195352491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213491420.

The product of its digits is 6998400, while the sum is 56.

The spelling of 683195352491 in words is "six hundred eighty-three billion, one hundred ninety-five million, three hundred fifty-two thousand, four hundred ninety-one".