1233680257 has 2 divisors, whose sum is σ = 1233680258. Its totient is φ = 1233680256.

The previous prime is 1233680249. The next prime is 1233680263. The reversal of 1233680257 is 7520863321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1205547841 + 28132416 = 34721^2 + 5304^2 .

It is an emirp because it is prime and its reverse (7520863321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1233680257 - 2³ = 1233680249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1233680207) 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, 616840128 + 616840129.

It is an arithmetic number, because the mean of its divisors is an integer number (616840129).

Almost surely, 2^1233680257 is an apocalyptic number.

It is an amenable number.

1233680257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233680257 is an equidigital number, since it uses as much as digits as its factorization.

1233680257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1233680257 is about 35123.7847761314. The cubic root of 1233680257 is about 1072.5088179264.

The spelling of 1233680257 in words is "one billion, two hundred thirty-three million, six hundred eighty thousand, two hundred fifty-seven".