97993091 has 6 divisors (see below), whose sum is σ = 113992020. Its totient is φ = 83994036.

The previous prime is 97993081. The next prime is 97993097. The reversal of 97993091 is 19039979.

It is a happy number.

It is not a de Polignac number, because 97993091 - 2¹⁰ = 97992067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97993097) 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 5 ways as a sum of consecutive naturals, for example, 999881 + ... + 999978.

It is an arithmetic number, because the mean of its divisors is an integer number (18998670).

Almost surely, 2^97993091 is an apocalyptic number.

97993091 is a deficient number, since it is larger than the sum of its proper divisors (15998929).

97993091 is a wasteful number, since it uses less digits than its factorization.

97993091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999873 (or 1999866 counting only the distinct ones).

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 97993091 is about 9899.1459732646. The cubic root of 97993091 is about 461.0327944259.

The spelling of 97993091 in words is "ninety-seven million, nine hundred ninety-three thousand, ninety-one".