997891796 has 24 divisors (see below), whose sum is σ = 1906355136. Its totient is φ = 453280320.

The previous prime is 997891793. The next prime is 997891831. The reversal of 997891796 is 697198799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997891793) 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 7 ways as a sum of consecutive naturals, for example, 66065 + ... + 79751.

It is an arithmetic number, because the mean of its divisors is an integer number (79431464).

Almost surely, 2^997891796 is an apocalyptic number.

It is an amenable number.

997891796 is a deficient number, since it is larger than the sum of its proper divisors (908463340).

997891796 is a wasteful number, since it uses less digits than its factorization.

997891796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15359 (or 15357 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 65.

The square root of 997891796 is about 31589.4253825548. The cubic root of 997891796 is about 999.2967709181.

The spelling of 997891796 in words is "nine hundred ninety-seven million, eight hundred ninety-one thousand, seven hundred ninety-six".