6918413329 has 3 divisors (see below), whose sum is σ = 6918496507. Its totient is φ = 6918330152.

The previous prime is 6918413321. The next prime is 6918413371. The reversal of 6918413329 is 9233148196.

It is a happy number.

The square root of 6918413329 is 83177.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3787787025 + 3130626304 = 61545^2 + 55952^2 .

It is not a de Polignac number, because 6918413329 - 2³ = 6918413321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6918413321) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 41589 + ... + 124765.

Almost surely, 2^6918413329 is an apocalyptic number.

6918413329 is the 83177-th square number.

6918413329 is the 41589-th centered octagonal number.

It is an amenable number.

6918413329 is a deficient number, since it is larger than the sum of its proper divisors (83178).

6918413329 is an frugal number, since it uses more digits than its factorization.

6918413329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166354 (or 83177 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The cubic root of 6918413329 is about 1905.4702310043.

The spelling of 6918413329 in words is "six billion, nine hundred eighteen million, four hundred thirteen thousand, three hundred twenty-nine".