998097172 has 12 divisors (see below), whose sum is σ = 1770597556. Its totient is φ = 492212160.

The previous prime is 998097157. The next prime is 998097179. The reversal of 998097172 is 271790899.

It can be written as a sum of positive squares in 2 ways, for example, as 764190736 + 233906436 = 27644^2 + 15294^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998097179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708779 + ... + 1709362.

Almost surely, 2^998097172 is an apocalyptic number.

It is an amenable number.

998097172 is a deficient number, since it is larger than the sum of its proper divisors (772500384).

998097172 is a wasteful number, since it uses less digits than its factorization.

998097172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418218 (or 3418216 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 998097172 is about 31592.6759233845. The cubic root of 998097172 is about 999.3653212681.

The spelling of 998097172 in words is "nine hundred ninety-eight million, ninety-seven thousand, one hundred seventy-two".