997013205 has 42 divisors (see below), whose sum is σ = 1797239574. Its totient is φ = 530723664.

The previous prime is 997013203. The next prime is 997013207. The reversal of 997013205 is 502310799.

It is an interprime number because it is at equal distance from previous prime (997013203) and next prime (997013207).

It can be written as a sum of positive squares in only one way, i.e., 797610564 + 199402641 = 28242^2 + 14121^2 .

It is not a de Polignac number, because 997013205 - 2¹ = 997013203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997013205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997013203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1906074 + ... + 1906596.

Almost surely, 2^997013205 is an apocalyptic number.

It is an amenable number.

997013205 is a deficient number, since it is larger than the sum of its proper divisors (800226369).

997013205 is an frugal number, since it uses more digits than its factorization.

997013205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 997013205 is about 31575.5159102745. The cubic root of 997013205 is about 999.0034088026.

The spelling of 997013205 in words is "nine hundred ninety-seven million, thirteen thousand, two hundred five".