997172002 has 16 divisors (see below), whose sum is σ = 1521511992. Its totient is φ = 490014720.

The previous prime is 997171999. The next prime is 997172017. The reversal of 997172002 is 200271799.

It can be written as a sum of positive squares in 4 ways, for example, as 223831521 + 773340481 = 14961^2 + 27809^2 .

It is a super-3 number, since 3×997172002³ (a number of 28 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 197218 + ... + 202210.

Almost surely, 2^997172002 is an apocalyptic number.

997172002 is the 19972-nd heptagonal number.

997172002 is a deficient number, since it is larger than the sum of its proper divisors (524339990).

997172002 is a wasteful number, since it uses less digits than its factorization.

997172002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 997172002 is about 31578.0303692298. The cubic root of 997172002 is about 999.0564439821.

The spelling of 997172002 in words is "nine hundred ninety-seven million, one hundred seventy-two thousand, two".