680750249 has 2 divisors, whose sum is σ = 680750250. Its totient is φ = 680750248.

The previous prime is 680750233. The next prime is 680750269. The reversal of 680750249 is 942057086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503194624 + 177555625 = 22432^2 + 13325^2 .

It is a cyclic number.

It is not a de Polignac number, because 680750249 - 2⁴ = 680750233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680750269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340375124 + 340375125.

It is an arithmetic number, because the mean of its divisors is an integer number (340375125).

Almost surely, 2^680750249 is an apocalyptic number.

It is an amenable number.

680750249 is a deficient number, since it is larger than the sum of its proper divisors (1).

680750249 is an equidigital number, since it uses as much as digits as its factorization.

680750249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 680750249 is about 26091.1910230254. The cubic root of 680750249 is about 879.6892192004.

The spelling of 680750249 in words is "six hundred eighty million, seven hundred fifty thousand, two hundred forty-nine".