1117255187 has 2 divisors, whose sum is σ = 1117255188. Its totient is φ = 1117255186.

The previous prime is 1117255169. The next prime is 1117255201. The reversal of 1117255187 is 7815527111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1117255187 - 2¹⁸ = 1116993043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1117255187.

It is not a weakly prime, because it can be changed into another prime (1117255987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558627593 + 558627594.

It is an arithmetic number, because the mean of its divisors is an integer number (558627594).

Almost surely, 2^1117255187 is an apocalyptic number.

1117255187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117255187 is an equidigital number, since it uses as much as digits as its factorization.

1117255187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 38.

The square root of 1117255187 is about 33425.3674175767. The cubic root of 1117255187 is about 1037.6497677440.

The spelling of 1117255187 in words is "one billion, one hundred seventeen million, two hundred fifty-five thousand, one hundred eighty-seven".