997118883 has 16 divisors (see below), whose sum is σ = 1517139360. Its totient is φ = 646779168.

The previous prime is 997118869. The next prime is 997118891. The reversal of 997118883 is 388811799.

It is not a de Polignac number, because 997118883 - 2⁹ = 997118371 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (997110883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498060 + ... + 500057.

It is an arithmetic number, because the mean of its divisors is an integer number (94821210).

Almost surely, 2^997118883 is an apocalyptic number.

997118883 is a deficient number, since it is larger than the sum of its proper divisors (520020477).

997118883 is a wasteful number, since it uses less digits than its factorization.

997118883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998163 (or 998157 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The square root of 997118883 is about 31577.1892827718. The cubic root of 997118883 is about 999.0387038725.

It can be divided in two parts, 997118 and 883, that added together give a square (998001 = 999²).

The spelling of 997118883 in words is "nine hundred ninety-seven million, one hundred eighteen thousand, eight hundred eighty-three".