97809944 has 16 divisors (see below), whose sum is σ = 188350800. Its totient is φ = 47583072.

The previous prime is 97809941. The next prime is 97809983. The reversal of 97809944 is 44990879.

It is a junction number, because it is equal to n+sod(n) for n = 97809892 and 97809901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97809941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164924 + ... + 165515.

It is an arithmetic number, because the mean of its divisors is an integer number (11771925).

Almost surely, 2^97809944 is an apocalyptic number.

It is an amenable number.

97809944 is a deficient number, since it is larger than the sum of its proper divisors (90540856).

97809944 is a wasteful number, since it uses less digits than its factorization.

97809944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330482 (or 330478 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 97809944 is about 9889.8910004105. The cubic root of 97809944 is about 460.7453951459.

The spelling of 97809944 in words is "ninety-seven million, eight hundred nine thousand, nine hundred forty-four".