6930717257 has 4 divisors (see below), whose sum is σ = 6930931200. Its totient is φ = 6930503316.

The previous prime is 6930717239. The next prime is 6930717293. The reversal of 6930717257 is 7527170396.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6930717257 - 2²⁴ = 6913940041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6930717217) 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, 47273 + ... + 126870.

It is an arithmetic number, because the mean of its divisors is an integer number (1732732800).

Almost surely, 2^6930717257 is an apocalyptic number.

It is an amenable number.

6930717257 is a deficient number, since it is larger than the sum of its proper divisors (213943).

6930717257 is a wasteful number, since it uses less digits than its factorization.

6930717257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213942.

The product of its (nonzero) digits is 555660, while the sum is 47.

The square root of 6930717257 is about 83250.9294662828. The cubic root of 6930717257 is about 1906.5991451460.

The spelling of 6930717257 in words is "six billion, nine hundred thirty million, seven hundred seventeen thousand, two hundred fifty-seven".