1172717993 has 2 divisors, whose sum is σ = 1172717994. Its totient is φ = 1172717992.

The previous prime is 1172717989. The next prime is 1172718013. The reversal of 1172717993 is 3997172711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1167110569 + 5607424 = 34163^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172717993 - 2² = 1172717989 is a prime.

It is a super-2 number, since 2×1172717993² = 2750534982211896098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1172717983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586358996 + 586358997.

It is an arithmetic number, because the mean of its divisors is an integer number (586358997).

Almost surely, 2^1172717993 is an apocalyptic number.

It is an amenable number.

1172717993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172717993 is an equidigital number, since it uses as much as digits as its factorization.

1172717993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 47.

The square root of 1172717993 is about 34244.9703314224. The cubic root of 1172717993 is about 1054.5435738182.

The spelling of 1172717993 in words is "one billion, one hundred seventy-two million, seven hundred seventeen thousand, nine hundred ninety-three".