97991105 has 8 divisors (see below), whose sum is σ = 117754152. Its totient is φ = 78283008.

The previous prime is 97991057. The next prime is 97991119. The reversal of 97991105 is 50119979.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43467649 + 54523456 = 6593^2 + 7384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97991105 - 2²⁴ = 81213889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9704 + ... + 17033.

It is an arithmetic number, because the mean of its divisors is an integer number (14719269).

Almost surely, 2^97991105 is an apocalyptic number.

It is an amenable number.

97991105 is a deficient number, since it is larger than the sum of its proper divisors (19763047).

97991105 is a wasteful number, since it uses less digits than its factorization.

97991105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27475.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 97991105 is about 9899.0456610726. The cubic root of 97991105 is about 461.0296798618.

The spelling of 97991105 in words is "ninety-seven million, nine hundred ninety-one thousand, one hundred five".