99731097 has 6 divisors (see below), whose sum is σ = 144056042. Its totient is φ = 66487392.

The previous prime is 99731081. The next prime is 99731117. The reversal of 99731097 is 79013799.

It can be written as a sum of positive squares in only one way, i.e., 81378441 + 18352656 = 9021^2 + 4284^2 .

It is not a de Polignac number, because 99731097 - 2⁴ = 99731081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99731297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5540608 + ... + 5540625.

Almost surely, 2^99731097 is an apocalyptic number.

It is an amenable number.

99731097 is a deficient number, since it is larger than the sum of its proper divisors (44324945).

99731097 is a wasteful number, since it uses less digits than its factorization.

99731097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11081239 (or 11081236 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 99731097 is about 9986.5457992241. The cubic root of 99731097 is about 463.7424641627.

The spelling of 99731097 in words is "ninety-nine million, seven hundred thirty-one thousand, ninety-seven".