680945457 has 4 divisors (see below), whose sum is σ = 907927280. Its totient is φ = 453963636.

The previous prime is 680945413. The next prime is 680945459. The reversal of 680945457 is 754549086.

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 not a de Polignac number, because 680945457 - 2¹⁵ = 680912689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680945459) 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, 113490907 + ... + 113490912.

It is an arithmetic number, because the mean of its divisors is an integer number (226981820).

Almost surely, 2^680945457 is an apocalyptic number.

It is an amenable number.

680945457 is a deficient number, since it is larger than the sum of its proper divisors (226981823).

680945457 is a wasteful number, since it uses less digits than its factorization.

680945457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226981822.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The square root of 680945457 is about 26094.9316343232. The cubic root of 680945457 is about 879.7732960269.

The spelling of 680945457 in words is "six hundred eighty million, nine hundred forty-five thousand, four hundred fifty-seven".