1118815697 has 2 divisors, whose sum is σ = 1118815698. Its totient is φ = 1118815696.

The previous prime is 1118815669. The next prime is 1118815787. The reversal of 1118815697 is 7965188111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003875856 + 114939841 = 31684^2 + 10721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118815697 - 2²² = 1114621393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1118815597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559407848 + 559407849.

It is an arithmetic number, because the mean of its divisors is an integer number (559407849).

Almost surely, 2^1118815697 is an apocalyptic number.

It is an amenable number.

1118815697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118815697 is an equidigital number, since it uses as much as digits as its factorization.

1118815697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 47.

The square root of 1118815697 is about 33448.7024710974. The cubic root of 1118815697 is about 1038.1326504218.

The spelling of 1118815697 in words is "one billion, one hundred eighteen million, eight hundred fifteen thousand, six hundred ninety-seven".