997874018 has 8 divisors (see below), whose sum is σ = 1497146412. Its totient is φ = 498825216.

The previous prime is 997873997. The next prime is 997874069. The reversal of 997874018 is 810478799.

It can be written as a sum of positive squares in 2 ways, for example, as 997485889 + 388129 = 31583^2 + 623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44255 + ... + 62882.

Almost surely, 2^997874018 is an apocalyptic number.

997874018 is a deficient number, since it is larger than the sum of its proper divisors (499272394).

997874018 is a wasteful number, since it uses less digits than its factorization.

997874018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111796.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 997874018 is about 31589.1439896683. The cubic root of 997874018 is about 999.2908365394.

The spelling of 997874018 in words is "nine hundred ninety-seven million, eight hundred seventy-four thousand, eighteen".