6426939393 has 12 divisors (see below), whose sum is σ = 10609550848. Its totient is φ = 3672536760.

The previous prime is 6426939361. The next prime is 6426939397. The reversal of 6426939393 is 3939396246.

It is a happy number.

It is not a de Polignac number, because 6426939393 - 2⁵ = 6426939361 is a prime.

It is a super-3 number, since 3×6426939393³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6426939397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51007393 + ... + 51007518.

Almost surely, 2^6426939393 is an apocalyptic number.

6426939393 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6426939393 is a deficient number, since it is larger than the sum of its proper divisors (4182611455).

6426939393 is a wasteful number, since it uses less digits than its factorization.

6426939393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102014924 (or 102014921 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 54.

The square root of 6426939393 is about 80168.1943977785. The cubic root of 6426939393 is about 1859.2369199001.

The spelling of 6426939393 in words is "six billion, four hundred twenty-six million, nine hundred thirty-nine thousand, three hundred ninety-three".