97905993 has 16 divisors (see below), whose sum is σ = 137733120. Its totient is φ = 61690896.

The previous prime is 97905979. The next prime is 97906013. The reversal of 97905993 is 39950979.

It is not a de Polignac number, because 97905993 - 2⁹ = 97905481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97905923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25996 + ... + 29522.

It is an arithmetic number, because the mean of its divisors is an integer number (8608320).

Almost surely, 2^97905993 is an apocalyptic number.

It is an amenable number.

97905993 is a deficient number, since it is larger than the sum of its proper divisors (39827127).

97905993 is a wasteful number, since it uses less digits than its factorization.

97905993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036.

The product of its (nonzero) digits is 688905, while the sum is 51.

The square root of 97905993 is about 9894.7457268997. The cubic root of 97905993 is about 460.8961625586.

The spelling of 97905993 in words is "ninety-seven million, nine hundred five thousand, nine hundred ninety-three".