997461765 has 24 divisors (see below), whose sum is σ = 1735197048. Its totient is φ = 530052480.

The previous prime is 997461761. The next prime is 997461779. The reversal of 997461765 is 567164799.

997461765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30935844 + 966525921 = 5562^2 + 31089^2 .

It is not a de Polignac number, because 997461765 - 2² = 997461761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997461761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27546 + ... + 52475.

It is an arithmetic number, because the mean of its divisors is an integer number (72299877).

Almost surely, 2^997461765 is an apocalyptic number.

It is an amenable number.

997461765 is a deficient number, since it is larger than the sum of its proper divisors (737735283).

997461765 is a wasteful number, since it uses less digits than its factorization.

997461765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80309 (or 80306 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 997461765 is about 31582.6180833698. The cubic root of 997461765 is about 999.1532048070.

The spelling of 997461765 in words is "nine hundred ninety-seven million, four hundred sixty-one thousand, seven hundred sixty-five".