997874 has 4 divisors (see below), whose sum is σ = 1496814. Its totient is φ = 498936.

The previous prime is 997813. The next prime is 997877. The reversal of 997874 is 478799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478799 = 521 ⋅919.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 85849 = 955^2 + 293^2 .

It is not an unprimeable number, because it can be changed into a prime (997877) 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 as a sum of consecutive naturals, namely, 249467 + ... + 249470.

2⁹⁹⁷⁸⁷⁴ is an apocalyptic number.

997874 is a deficient number, since it is larger than the sum of its proper divisors (498940).

997874 is a wasteful number, since it uses less digits than its factorization.

997874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498939.

The product of its digits is 127008, while the sum is 44.

The square root of 997874 is about 998.9364344141. The cubic root of 997874 is about 99.9290830531.

The spelling of 997874 in words is "nine hundred ninety-seven thousand, eight hundred seventy-four".