1173680857 has 2 divisors, whose sum is σ = 1173680858. Its totient is φ = 1173680856.

The previous prime is 1173680819. The next prime is 1173680861. The reversal of 1173680857 is 7580863711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 965282761 + 208398096 = 31069^2 + 14436^2 .

It is an emirp because it is prime and its reverse (7580863711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1173680857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1173680957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586840428 + 586840429.

It is an arithmetic number, because the mean of its divisors is an integer number (586840429).

Almost surely, 2^1173680857 is an apocalyptic number.

It is an amenable number.

1173680857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173680857 is an equidigital number, since it uses as much as digits as its factorization.

1173680857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 1173680857 is about 34259.0259201863. The cubic root of 1173680857 is about 1054.8321070325.

The spelling of 1173680857 in words is "one billion, one hundred seventy-three million, six hundred eighty thousand, eight hundred fifty-seven".