1117927817 has 2 divisors, whose sum is σ = 1117927818. Its totient is φ = 1117927816.

The previous prime is 1117927807. The next prime is 1117927901. The reversal of 1117927817 is 7187297111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840072256 + 277855561 = 28984^2 + 16669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117927817 - 2⁸ = 1117927561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1117927807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558963908 + 558963909.

It is an arithmetic number, because the mean of its divisors is an integer number (558963909).

Almost surely, 2^1117927817 is an apocalyptic number.

It is an amenable number.

1117927817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117927817 is an equidigital number, since it uses as much as digits as its factorization.

1117927817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 44.

The square root of 1117927817 is about 33435.4275731596. The cubic root of 1117927817 is about 1037.8579608089.

The spelling of 1117927817 in words is "one billion, one hundred seventeen million, nine hundred twenty-seven thousand, eight hundred seventeen".