97720930 has 32 divisors (see below), whose sum is σ = 186748416. Its totient is φ = 36689664.

The previous prime is 97720873. The next prime is 97720957. The reversal of 97720930 is 3902779.

It is a self number, because there is not a number n which added to its sum of digits gives 97720930.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 102717 + ... + 103663.

It is an arithmetic number, because the mean of its divisors is an integer number (5835888).

Almost surely, 2^97720930 is an apocalyptic number.

97720930 is a deficient number, since it is larger than the sum of its proper divisors (89027486).

97720930 is a wasteful number, since it uses less digits than its factorization.

97720930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 97720930 is about 9885.3897242344. The cubic root of 97720930 is about 460.6055823732.

The spelling of 97720930 in words is "ninety-seven million, seven hundred twenty thousand, nine hundred thirty".