6961246821 has 6 divisors (see below), whose sum is σ = 10055134310. Its totient is φ = 4640831208.

The previous prime is 6961246811. The next prime is 6961246843. The reversal of 6961246821 is 1286421696.

6961246821 is a `hidden beast` number, since 6 + 9 + 612 + 4 + 6 + 8 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3667634721 + 3293612100 = 60561^2 + 57390^2 .

It is not a de Polignac number, because 6961246821 - 2¹³ = 6961238629 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 (6961246811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 386735926 + ... + 386735943.

Almost surely, 2^6961246821 is an apocalyptic number.

It is an amenable number.

6961246821 is a deficient number, since it is larger than the sum of its proper divisors (3093887489).

6961246821 is a wasteful number, since it uses less digits than its factorization.

6961246821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773471875 (or 773471872 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 6961246821 is about 83434.0866852391. The cubic root of 6961246821 is about 1909.3945451737.

The spelling of 6961246821 in words is "six billion, nine hundred sixty-one million, two hundred forty-six thousand, eight hundred twenty-one".