6423999413 has 4 divisors (see below), whose sum is σ = 6918153228. Its totient is φ = 5929845600.

The previous prime is 6423999391. The next prime is 6423999431. The reversal of 6423999413 is 3149993246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3149993246 = 2 ⋅1574996623.

It can be written as a sum of positive squares in 2 ways, for example, as 3215116804 + 3208882609 = 56702^2 + 56647^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423999413 - 2⁸ = 6423999157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423999443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247076888 + ... + 247076913.

It is an arithmetic number, because the mean of its divisors is an integer number (1729538307).

Almost surely, 2^6423999413 is an apocalyptic number.

It is an amenable number.

6423999413 is a deficient number, since it is larger than the sum of its proper divisors (494153815).

6423999413 is a wasteful number, since it uses less digits than its factorization.

6423999413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494153814.

The product of its digits is 1259712, while the sum is 50.

The square root of 6423999413 is about 80149.8559761650. The cubic root of 6423999413 is about 1858.9533762763.

The spelling of 6423999413 in words is "six billion, four hundred twenty-three million, nine hundred ninety-nine thousand, four hundred thirteen".