6930731657 has 4 divisors (see below), whose sum is σ = 7232067840. Its totient is φ = 6629395476.

The previous prime is 6930731641. The next prime is 6930731693. The reversal of 6930731657 is 7561370396.

6930731657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6930731657 - 2⁴ = 6930731641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6930731057) 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, 150668057 + ... + 150668102.

It is an arithmetic number, because the mean of its divisors is an integer number (1808016960).

Almost surely, 2^6930731657 is an apocalyptic number.

It is an amenable number.

6930731657 is a deficient number, since it is larger than the sum of its proper divisors (301336183).

6930731657 is a wasteful number, since it uses less digits than its factorization.

6930731657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301336182.

The product of its (nonzero) digits is 714420, while the sum is 47.

The square root of 6930731657 is about 83251.0159517588. The cubic root of 6930731657 is about 1906.6004655965.

The spelling of 6930731657 in words is "six billion, nine hundred thirty million, seven hundred thirty-one thousand, six hundred fifty-seven".