1170397817 has 2 divisors, whose sum is σ = 1170397818. Its totient is φ = 1170397816.

The previous prime is 1170397783. The next prime is 1170397819. The reversal of 1170397817 is 7187930711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976937536 + 193460281 = 31256^2 + 13909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170397817 - 2²⁰ = 1169349241 is a prime.

Together with 1170397819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1170397819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585198908 + 585198909.

It is an arithmetic number, because the mean of its divisors is an integer number (585198909).

Almost surely, 2^1170397817 is an apocalyptic number.

It is an amenable number.

1170397817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1170397817 is an equidigital number, since it uses as much as digits as its factorization.

1170397817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 44.

The square root of 1170397817 is about 34211.0774019176. The cubic root of 1170397817 is about 1053.8476571342.

The spelling of 1170397817 in words is "one billion, one hundred seventy million, three hundred ninety-seven thousand, eight hundred seventeen".