1118981953 has 12 divisors (see below), whose sum is σ = 1182540180. Its totient is φ = 1058684256.

The previous prime is 1118981933. The next prime is 1118981977. The reversal of 1118981953 is 3591898111.

It can be written as a sum of positive squares in 2 ways, for example, as 588693169 + 530288784 = 24263^2 + 23028^2 .

It is not a de Polignac number, because 1118981953 - 2¹³ = 1118973761 is a prime.

It is a super-2 number, since 2×1118981953² = 2504241222279388418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1118981923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358363 + ... + 361471.

It is an arithmetic number, because the mean of its divisors is an integer number (98545015).

Almost surely, 2^1118981953 is an apocalyptic number.

It is an amenable number.

1118981953 is a deficient number, since it is larger than the sum of its proper divisors (63558227).

1118981953 is an equidigital number, since it uses as much as digits as its factorization.

1118981953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144 (or 4125 counting only the distinct ones).

The product of its digits is 77760, while the sum is 46.

The square root of 1118981953 is about 33451.1876171833. The cubic root of 1118981953 is about 1038.1840700417.

The spelling of 1118981953 in words is "one billion, one hundred eighteen million, nine hundred eighty-one thousand, nine hundred fifty-three".