1118981907 has 12 divisors (see below), whose sum is σ = 1672042320. Its totient is φ = 720264048.

The previous prime is 1118981891. The next prime is 1118981909. The reversal of 1118981907 is 7091898111.

It is not a de Polignac number, because 1118981907 - 2⁴ = 1118981891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118981909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2143383 + ... + 2143904.

It is an arithmetic number, because the mean of its divisors is an integer number (139336860).

Almost surely, 2^1118981907 is an apocalyptic number.

1118981907 is a deficient number, since it is larger than the sum of its proper divisors (553060413).

1118981907 is a wasteful number, since it uses less digits than its factorization.

1118981907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287322 (or 4287319 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 45.

The square root of 1118981907 is about 33451.1869296143. The cubic root of 1118981907 is about 1038.1840558155.

It can be divided in two parts, 11189 and 81907, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 1118981907 in words is "one billion, one hundred eighteen million, nine hundred eighty-one thousand, nine hundred seven".