7983635813 has 4 divisors (see below), whose sum is σ = 7987607808. Its totient is φ = 7979663820.

The previous prime is 7983635791. The next prime is 7983635819. The reversal of 7983635813 is 3185363897.

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 a de Polignac number, because none of the positive numbers 2^k-7983635813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7983635819) 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, 1982981 + ... + 1987002.

It is an arithmetic number, because the mean of its divisors is an integer number (1996901952).

Almost surely, 2^7983635813 is an apocalyptic number.

It is an amenable number.

7983635813 is a deficient number, since it is larger than the sum of its proper divisors (3971995).

7983635813 is a wasteful number, since it uses less digits than its factorization.

7983635813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971994.

The product of its digits is 3265920, while the sum is 53.

The square root of 7983635813 is about 89351.1936853672. The cubic root of 7983635813 is about 1998.6353868773.

The spelling of 7983635813 in words is "seven billion, nine hundred eighty-three million, six hundred thirty-five thousand, eight hundred thirteen".