997802 has 8 divisors (see below), whose sum is σ = 1611876. Its totient is φ = 460512.

The previous prime is 997793. The next prime is 997807. The reversal of 997802 is 208799.

It can be written as a sum of positive squares in 2 ways, for example, as 707281 + 290521 = 841^2 + 539^2 .

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

It is not an unprimeable number, because it can be changed into a prime (997807) by changing a digit.

997802 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19163 + ... + 19214.

2⁹⁹⁷⁸⁰² is an apocalyptic number.

997802 is a deficient number, since it is larger than the sum of its proper divisors (614074).

997802 is a wasteful number, since it uses less digits than its factorization.

997802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38392.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 997802 is about 998.9003954349. The cubic root of 997802 is about 99.9266795876.

The spelling of 997802 in words is "nine hundred ninety-seven thousand, eight hundred two".