1118371729 has 2 divisors, whose sum is σ = 1118371730. Its totient is φ = 1118371728.

The previous prime is 1118371699. The next prime is 1118371733. The reversal of 1118371729 is 9271738111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855445504 + 262926225 = 29248^2 + 16215^2 .

It is an emirp because it is prime and its reverse (9271738111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1118371729 - 2⁵ = 1118371697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1118371691 and 1118371700.

It is not a weakly prime, because it can be changed into another prime (1118371229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559185864 + 559185865.

It is an arithmetic number, because the mean of its divisors is an integer number (559185865).

Almost surely, 2^1118371729 is an apocalyptic number.

It is an amenable number.

1118371729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118371729 is an equidigital number, since it uses as much as digits as its factorization.

1118371729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 40.

The square root of 1118371729 is about 33442.0652621814. The cubic root of 1118371729 is about 1037.9953151259.

The spelling of 1118371729 in words is "one billion, one hundred eighteen million, three hundred seventy-one thousand, seven hundred twenty-nine".