6949935221 has 2 divisors, whose sum is σ = 6949935222. Its totient is φ = 6949935220.

The previous prime is 6949935217. The next prime is 6949935227. The reversal of 6949935221 is 1225399496.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5283254596 + 1666680625 = 72686^2 + 40825^2 .

It is a cyclic number.

It is not a de Polignac number, because 6949935221 - 2² = 6949935217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6949935221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6949935227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3474967610 + 3474967611.

It is an arithmetic number, because the mean of its divisors is an integer number (3474967611).

Almost surely, 2^6949935221 is an apocalyptic number.

It is an amenable number.

6949935221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6949935221 is an equidigital number, since it uses as much as digits as its factorization.

6949935221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 6949935221 is about 83366.2714831364. The cubic root of 6949935221 is about 1908.3597680661.

The spelling of 6949935221 in words is "six billion, nine hundred forty-nine million, nine hundred thirty-five thousand, two hundred twenty-one".