6399069893 has 2 divisors, whose sum is σ = 6399069894. Its totient is φ = 6399069892.

The previous prime is 6399069877. The next prime is 6399069931. The reversal of 6399069893 is 3989609936.

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., 6181418884 + 217651009 = 78622^2 + 14753^2 .

It is a cyclic number.

It is not a de Polignac number, because 6399069893 - 2⁴ = 6399069877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6399069863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199534946 + 3199534947.

It is an arithmetic number, because the mean of its divisors is an integer number (3199534947).

Almost surely, 2^6399069893 is an apocalyptic number.

It is an amenable number.

6399069893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399069893 is an equidigital number, since it uses as much as digits as its factorization.

6399069893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The square root of 6399069893 is about 79994.1866200288. The cubic root of 6399069893 is about 1856.5455879572.

The spelling of 6399069893 in words is "six billion, three hundred ninety-nine million, sixty-nine thousand, eight hundred ninety-three".