997161746 has 32 divisors (see below), whose sum is σ = 1744055040. Its totient is φ = 418784256.

The previous prime is 997161733. The next prime is 997161797. The reversal of 997161746 is 647161799.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 997161694 and 997161703.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 136310 + ... + 143438.

It is an arithmetic number, because the mean of its divisors is an integer number (54501720).

Almost surely, 2^997161746 is an apocalyptic number.

997161746 is a deficient number, since it is larger than the sum of its proper divisors (746893294).

997161746 is a wasteful number, since it uses less digits than its factorization.

997161746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338.

The product of its digits is 571536, while the sum is 50.

The square root of 997161746 is about 31577.8679774300. The cubic root of 997161746 is about 999.0530188431.

It can be divided in two parts, 9971 and 61746, that added together give a palindrome (71717).

The spelling of 997161746 in words is "nine hundred ninety-seven million, one hundred sixty-one thousand, seven hundred forty-six".