680455917 has 8 divisors (see below), whose sum is σ = 1008082880. Its totient is φ = 453637260.

The previous prime is 680455903. The next prime is 680455931. The reversal of 680455917 is 719554086.

680455917 is a `hidden beast` number, since 6 + 80 + 4 + 559 + 17 = 666.

It is an interprime number because it is at equal distance from previous prime (680455903) and next prime (680455931).

It is not a de Polignac number, because 680455917 - 2⁴ = 680455901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680454917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12601009 + ... + 12601062.

It is an arithmetic number, because the mean of its divisors is an integer number (126010360).

Almost surely, 2^680455917 is an apocalyptic number.

It is an amenable number.

680455917 is a deficient number, since it is larger than the sum of its proper divisors (327626963).

680455917 is a wasteful number, since it uses less digits than its factorization.

680455917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25202080 (or 25202074 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 680455917 is about 26085.5499654502. The cubic root of 680455917 is about 879.5624188980.

The spelling of 680455917 in words is "six hundred eighty million, four hundred fifty-five thousand, nine hundred seventeen".