680764237 has 2 divisors, whose sum is σ = 680764238. Its totient is φ = 680764236.

The previous prime is 680764213. The next prime is 680764267. The reversal of 680764237 is 732467086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524364201 + 156400036 = 22899^2 + 12506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680764237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680764193 and 680764202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680764207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340382118 + 340382119.

It is an arithmetic number, because the mean of its divisors is an integer number (340382119).

Almost surely, 2^680764237 is an apocalyptic number.

It is an amenable number.

680764237 is a deficient number, since it is larger than the sum of its proper divisors (1).

680764237 is an equidigital number, since it uses as much as digits as its factorization.

680764237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 680764237 is about 26091.4590814696. The cubic root of 680764237 is about 879.6952444197.

The spelling of 680764237 in words is "six hundred eighty million, seven hundred sixty-four thousand, two hundred thirty-seven".