997470009 has 12 divisors (see below), whose sum is σ = 1454009700. Its totient is φ = 658878624.

The previous prime is 997469969. The next prime is 997470031. The reversal of 997470009 is 900074799.

It can be written as a sum of positive squares in 2 ways, for example, as 280730025 + 716739984 = 16755^2 + 26772^2 .

It is not a de Polignac number, because 997470009 - 2²⁴ = 980692793 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (997470059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507414 + ... + 509375.

It is an arithmetic number, because the mean of its divisors is an integer number (121167475).

Almost surely, 2^997470009 is an apocalyptic number.

It is an amenable number.

997470009 is a deficient number, since it is larger than the sum of its proper divisors (456539691).

997470009 is a wasteful number, since it uses less digits than its factorization.

997470009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016904 (or 1016901 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 997470009 is about 31582.7485979292. The cubic root of 997470009 is about 999.1559574593.

The spelling of 997470009 in words is "nine hundred ninety-seven million, four hundred seventy thousand, nine".