6975043921 has 2 divisors, whose sum is σ = 6975043922. Its totient is φ = 6975043920.

The previous prime is 6975043879. The next prime is 6975043939. The reversal of 6975043921 is 1293405796.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3871328400 + 3103715521 = 62220^2 + 55711^2 .

It is a cyclic number.

It is not a de Polignac number, because 6975043921 - 2²³ = 6966655313 is a prime.

It is not a weakly prime, because it can be changed into another prime (6975043981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3487521960 + 3487521961.

It is an arithmetic number, because the mean of its divisors is an integer number (3487521961).

Almost surely, 2^6975043921 is an apocalyptic number.

It is an amenable number.

6975043921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6975043921 is an equidigital number, since it uses as much as digits as its factorization.

6975043921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 6975043921 is about 83516.7283901854. The cubic root of 6975043921 is about 1910.6551776789.

The spelling of 6975043921 in words is "six billion, nine hundred seventy-five million, forty-three thousand, nine hundred twenty-one".