680123461 has 2 divisors, whose sum is σ = 680123462. Its totient is φ = 680123460.

The previous prime is 680123447. The next prime is 680123473. The reversal of 680123461 is 164321086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481144225 + 198979236 = 21935^2 + 14106^2 .

It is a cyclic number.

It is not a de Polignac number, because 680123461 - 2⁷ = 680123333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680123491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340061730 + 340061731.

It is an arithmetic number, because the mean of its divisors is an integer number (340061731).

Almost surely, 2^680123461 is an apocalyptic number.

It is an amenable number.

680123461 is a deficient number, since it is larger than the sum of its proper divisors (1).

680123461 is an equidigital number, since it uses as much as digits as its factorization.

680123461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 680123461 is about 26079.1767699826. The cubic root of 680123461 is about 879.4191505237.

The spelling of 680123461 in words is "six hundred eighty million, one hundred twenty-three thousand, four hundred sixty-one".