97798909 has 16 divisors (see below), whose sum is σ = 117391680. Its totient is φ = 80490240.

The previous prime is 97798891. The next prime is 97798913. The reversal of 97798909 is 90989779.

It is not a de Polignac number, because 97798909 - 2⁷ = 97798781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97798949) 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, 7447 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (7336980).

Almost surely, 2^97798909 is an apocalyptic number.

It is an amenable number.

97798909 is a deficient number, since it is larger than the sum of its proper divisors (19592771).

97798909 is a wasteful number, since it uses less digits than its factorization.

97798909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23340.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 97798909 is about 9889.3330917712. Note that the first 3 decimals coincide. The cubic root of 97798909 is about 460.7280672668.

The spelling of 97798909 in words is "ninety-seven million, seven hundred ninety-eight thousand, nine hundred nine".