997789941 has 8 divisors (see below), whose sum is σ = 1478207360. Its totient is φ = 665193276.

The previous prime is 997789913. The next prime is 997789951. The reversal of 997789941 is 149987799.

It is not a de Polignac number, because 997789941 - 2¹⁹ = 997265653 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 (997789951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18477565 + ... + 18477618.

It is an arithmetic number, because the mean of its divisors is an integer number (184775920).

Almost surely, 2^997789941 is an apocalyptic number.

It is an amenable number.

997789941 is a deficient number, since it is larger than the sum of its proper divisors (480417419).

997789941 is a wasteful number, since it uses less digits than its factorization.

997789941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36955192 (or 36955186 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 63.

The square root of 997789941 is about 31587.8131721713. The cubic root of 997789941 is about 999.2627702926.

The spelling of 997789941 in words is "nine hundred ninety-seven million, seven hundred eighty-nine thousand, nine hundred forty-one".