97818811 has 4 divisors (see below), whose sum is σ = 97883352. Its totient is φ = 97754272.

The previous prime is 97818781. The next prime is 97818817. The reversal of 97818811 is 11881879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97818811 - 2⁷ = 97818683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97818817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29941 + ... + 33046.

It is an arithmetic number, because the mean of its divisors is an integer number (24470838).

Almost surely, 2^97818811 is an apocalyptic number.

97818811 is a deficient number, since it is larger than the sum of its proper divisors (64541).

97818811 is a wasteful number, since it uses less digits than its factorization.

97818811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64540.

The product of its digits is 32256, while the sum is 43.

The square root of 97818811 is about 9890.3392762837. The cubic root of 97818811 is about 460.7593177452.

The spelling of 97818811 in words is "ninety-seven million, eight hundred eighteen thousand, eight hundred eleven".