6963863821 has 4 divisors (see below), whose sum is σ = 7095257532. Its totient is φ = 6832470112.

The previous prime is 6963863813. The next prime is 6963863843. The reversal of 6963863821 is 1283683696.

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 3339221796 + 3624642025 = 57786^2 + 60205^2 .

It is a cyclic number.

It is not a de Polignac number, because 6963863821 - 2³ = 6963863813 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 (6963863321) 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, 65696776 + ... + 65696881.

It is an arithmetic number, because the mean of its divisors is an integer number (1773814383).

Almost surely, 2^6963863821 is an apocalyptic number.

It is an amenable number.

6963863821 is a deficient number, since it is larger than the sum of its proper divisors (131393711).

6963863821 is a wasteful number, since it uses less digits than its factorization.

6963863821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131393710.

The product of its digits is 2239488, while the sum is 52.

The square root of 6963863821 is about 83449.7682501276. The cubic root of 6963863821 is about 1909.6337867736.

The spelling of 6963863821 in words is "six billion, nine hundred sixty-three million, eight hundred sixty-three thousand, eight hundred twenty-one".