6850722391 has 2 divisors, whose sum is σ = 6850722392. Its totient is φ = 6850722390.

The previous prime is 6850722377. The next prime is 6850722413. The reversal of 6850722391 is 1932270586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6850722391 - 2¹¹ = 6850720343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6850722331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425361195 + 3425361196.

It is an arithmetic number, because the mean of its divisors is an integer number (3425361196).

Almost surely, 2^6850722391 is an apocalyptic number.

6850722391 is a deficient number, since it is larger than the sum of its proper divisors (1).

6850722391 is an equidigital number, since it uses as much as digits as its factorization.

6850722391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 6850722391 is about 82769.0907948130. The cubic root of 6850722391 is about 1899.2353701655.

The spelling of 6850722391 in words is "six billion, eight hundred fifty million, seven hundred twenty-two thousand, three hundred ninety-one".