6313408921 has 4 divisors (see below), whose sum is σ = 6317363812. Its totient is φ = 6309454032.

The previous prime is 6313408879. The next prime is 6313408967. The reversal of 6313408921 is 1298043136.

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 2513919321 + 3799489600 = 50139^2 + 61640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6313408921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6313408991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975050 + ... + 1978243.

It is an arithmetic number, because the mean of its divisors is an integer number (1579340953).

Almost surely, 2^6313408921 is an apocalyptic number.

It is an amenable number.

6313408921 is a deficient number, since it is larger than the sum of its proper divisors (3954891).

6313408921 is a wasteful number, since it uses less digits than its factorization.

6313408921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954890.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 6313408921 is about 79456.9626967958. The cubic root of 6313408921 is about 1848.2241464632.

The spelling of 6313408921 in words is "six billion, three hundred thirteen million, four hundred eight thousand, nine hundred twenty-one".