6395740999 has 2 divisors, whose sum is σ = 6395741000. Its totient is φ = 6395740998.

The previous prime is 6395740979. The next prime is 6395741021. The reversal of 6395740999 is 9990475936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6395740999 - 2¹³ = 6395732807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6395740919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197870499 + 3197870500.

It is an arithmetic number, because the mean of its divisors is an integer number (3197870500).

Almost surely, 2^6395740999 is an apocalyptic number.

6395740999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6395740999 is an equidigital number, since it uses as much as digits as its factorization.

6395740999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16533720, while the sum is 61.

The square root of 6395740999 is about 79973.3768137872. The cubic root of 6395740999 is about 1856.2235976489.

The spelling of 6395740999 in words is "six billion, three hundred ninety-five million, seven hundred forty thousand, nine hundred ninety-nine".