1118781371 has 2 divisors, whose sum is σ = 1118781372. Its totient is φ = 1118781370.

The previous prime is 1118781359. The next prime is 1118781379. The reversal of 1118781371 is 1731878111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118781371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1118781379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559390685 + 559390686.

It is an arithmetic number, because the mean of its divisors is an integer number (559390686).

Almost surely, 2^1118781371 is an apocalyptic number.

1118781371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118781371 is an equidigital number, since it uses as much as digits as its factorization.

1118781371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 38.

The square root of 1118781371 is about 33448.1893530876. The cubic root of 1118781371 is about 1038.1220334495.

The spelling of 1118781371 in words is "one billion, one hundred eighteen million, seven hundred eighty-one thousand, three hundred seventy-one".