6963221421 has 24 divisors (see below), whose sum is σ = 10867016160. Its totient is φ = 4271079456.

The previous prime is 6963221413. The next prime is 6963221423. The reversal of 6963221421 is 1241223696.

It is a happy number.

6963221421 is a `hidden beast` number, since 6 + 9 + 6 + 3 + 221 + 421 = 666.

It is not a de Polignac number, because 6963221421 - 2³ = 6963221413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6963221423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61011 + ... + 132848.

It is an arithmetic number, because the mean of its divisors is an integer number (452792340).

Almost surely, 2^6963221421 is an apocalyptic number.

It is an amenable number.

6963221421 is a deficient number, since it is larger than the sum of its proper divisors (3903794739).

6963221421 is a wasteful number, since it uses less digits than its factorization.

6963221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194185 (or 194182 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6963221421 is about 83445.9191392845. The cubic root of 6963221421 is about 1909.5750652315.

The spelling of 6963221421 in words is "six billion, nine hundred sixty-three million, two hundred twenty-one thousand, four hundred twenty-one".