1177997 has 2 divisors, whose sum is σ = 1177998. Its totient is φ = 1177996.

The previous prime is 1177987. The next prime is 1178003. The reversal of 1177997 is 7997711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110916 + 67081 = 1054^2 + 259^2 .

It is an emirp because it is prime and its reverse (7997711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1177997 - 2⁶ = 1177933 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1177987) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 588998 + 588999.

It is an arithmetic number, because the mean of its divisors is an integer number (588999).

2^1177997 is an apocalyptic number.

It is an amenable number.

1177997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1177997 is an equidigital number, since it uses as much as digits as its factorization.

1177997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27783, while the sum is 41.

The square root of 1177997 is about 1085.3557020627. The cubic root of 1177997 is about 105.6123553132.

The spelling of 1177997 in words is "one million, one hundred seventy-seven thousand, nine hundred ninety-seven".