997089005 has 12 divisors (see below), whose sum is σ = 1315169436. Its totient is φ = 725155200.

The previous prime is 997088909. The next prime is 997089007. The reversal of 997089005 is 500980799.

It can be written as a sum of positive squares in 2 ways, for example, as 516471076 + 480617929 = 22726^2 + 21923^2 .

It is not a de Polignac number, because 997089005 - 2⁸ = 997088749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997089007) 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, 823436 + ... + 824645.

It is an arithmetic number, because the mean of its divisors is an integer number (109597453).

Almost surely, 2^997089005 is an apocalyptic number.

It is an amenable number.

997089005 is a deficient number, since it is larger than the sum of its proper divisors (318080431).

997089005 is a wasteful number, since it uses less digits than its factorization.

997089005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648108 (or 1648097 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 997089005 is about 31576.7161845560. The cubic root of 997089005 is about 999.0287252641.

The spelling of 997089005 in words is "nine hundred ninety-seven million, eighty-nine thousand, five".