1118128477 has 2 divisors, whose sum is σ = 1118128478. Its totient is φ = 1118128476.

The previous prime is 1118128399. The next prime is 1118128483. The reversal of 1118128477 is 7748218111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1117498041 + 630436 = 33429^2 + 794^2 .

It is an emirp because it is prime and its reverse (7748218111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118128477 is a prime.

It is a super-2 number, since 2×1118128477² = 2500422582156679058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118128177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559064238 + 559064239.

It is an arithmetic number, because the mean of its divisors is an integer number (559064239).

Almost surely, 2^1118128477 is an apocalyptic number.

It is an amenable number.

1118128477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118128477 is an equidigital number, since it uses as much as digits as its factorization.

1118128477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 40.

The square root of 1118128477 is about 33438.4281478660. The cubic root of 1118128477 is about 1037.9200531064.

The spelling of 1118128477 in words is "one billion, one hundred eighteen million, one hundred twenty-eight thousand, four hundred seventy-seven".