680654417 has 2 divisors, whose sum is σ = 680654418. Its totient is φ = 680654416.

The previous prime is 680654413. The next prime is 680654419. The reversal of 680654417 is 714456086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680635921 + 18496 = 26089^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 680654417 - 2² = 680654413 is a prime.

Together with 680654419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680654413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340327208 + 340327209.

It is an arithmetic number, because the mean of its divisors is an integer number (340327209).

Almost surely, 2^680654417 is an apocalyptic number.

It is an amenable number.

680654417 is a deficient number, since it is larger than the sum of its proper divisors (1).

680654417 is an equidigital number, since it uses as much as digits as its factorization.

680654417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 680654417 is about 26089.3544764910. The cubic root of 680654417 is about 879.6479381121.

The spelling of 680654417 in words is "six hundred eighty million, six hundred fifty-four thousand, four hundred seventeen".