6918938429 has 4 divisors (see below), whose sum is σ = 7451164476. Its totient is φ = 6386712384.

The previous prime is 6918938381. The next prime is 6918938449. The reversal of 6918938429 is 9248398196.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1245384100 + 5673554329 = 35290^2 + 75323^2 .

It is not a de Polignac number, because 6918938429 - 2²⁴ = 6902161213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918938449) 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, 266113004 + ... + 266113029.

It is an arithmetic number, because the mean of its divisors is an integer number (1862791119).

Almost surely, 2^6918938429 is an apocalyptic number.

It is an amenable number.

6918938429 is a deficient number, since it is larger than the sum of its proper divisors (532226047).

6918938429 is a wasteful number, since it uses less digits than its factorization.

6918938429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532226046.

The product of its digits is 6718464, while the sum is 59.

The square root of 6918938429 is about 83180.1564617427. The cubic root of 6918938429 is about 1905.5184374864.

The spelling of 6918938429 in words is "six billion, nine hundred eighteen million, nine hundred thirty-eight thousand, four hundred twenty-nine".