6858943493 has 2 divisors, whose sum is σ = 6858943494. Its totient is φ = 6858943492.

The previous prime is 6858943477. The next prime is 6858943499. The reversal of 6858943493 is 3943498586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6471719809 + 387223684 = 80447^2 + 19678^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858943493 - 2⁴ = 6858943477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6858943499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429471746 + 3429471747.

It is an arithmetic number, because the mean of its divisors is an integer number (3429471747).

Almost surely, 2^6858943493 is an apocalyptic number.

It is an amenable number.

6858943493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6858943493 is an equidigital number, since it uses as much as digits as its factorization.

6858943493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 59.

The square root of 6858943493 is about 82818.7387793366. The cubic root of 6858943493 is about 1899.9947823495.

The spelling of 6858943493 in words is "six billion, eight hundred fifty-eight million, nine hundred forty-three thousand, four hundred ninety-three".