6912994921 has 12 divisors (see below), whose sum is σ = 8043029460. Its totient is φ = 5924405760.

The previous prime is 6912994909. The next prime is 6912994927. The reversal of 6912994921 is 1294992196.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5146053696 + 1766941225 = 71736^2 + 42035^2 .

It is not a de Polignac number, because 6912994921 - 2¹¹ = 6912992873 is a prime.

It is a super-3 number, since 3×6912994921³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6912994927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467481 + ... + 482041.

It is an arithmetic number, because the mean of its divisors is an integer number (670252455).

Almost surely, 2^6912994921 is an apocalyptic number.

It is an amenable number.

6912994921 is a deficient number, since it is larger than the sum of its proper divisors (1130034539).

6912994921 is a wasteful number, since it uses less digits than its factorization.

6912994921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24264 (or 24257 counting only the distinct ones).

The product of its digits is 629856, while the sum is 52.

The square root of 6912994921 is about 83144.4220678694. The cubic root of 6912994921 is about 1904.9726548891.

The spelling of 6912994921 in words is "six billion, nine hundred twelve million, nine hundred ninety-four thousand, nine hundred twenty-one".