6423215749 has 2 divisors, whose sum is σ = 6423215750. Its totient is φ = 6423215748.

The previous prime is 6423215741. The next prime is 6423215783. The reversal of 6423215749 is 9475123246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4609052100 + 1814163649 = 67890^2 + 42593^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423215749 - 2³ = 6423215741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6423215741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211607874 + 3211607875.

It is an arithmetic number, because the mean of its divisors is an integer number (3211607875).

Almost surely, 2^6423215749 is an apocalyptic number.

It is an amenable number.

6423215749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6423215749 is an equidigital number, since it uses as much as digits as its factorization.

6423215749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 6423215749 is about 80144.9670846523. The cubic root of 6423215749 is about 1858.8777819314.

The spelling of 6423215749 in words is "six billion, four hundred twenty-three million, two hundred fifteen thousand, seven hundred forty-nine".