99097081 has 2 divisors, whose sum is σ = 99097082. Its totient is φ = 99097080.

The previous prime is 99097079. The next prime is 99097093. The reversal of 99097081 is 18079099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 38007225 = 7816^2 + 6165^2 .

It is an emirp because it is prime and its reverse (18079099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99097081 - 2¹ = 99097079 is a prime.

It is a super-2 number, since 2×99097081² = 19640462925441122, which contains 22 as substring.

Together with 99097079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99097051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49548540 + 49548541.

It is an arithmetic number, because the mean of its divisors is an integer number (49548541).

Almost surely, 2^99097081 is an apocalyptic number.

It is an amenable number.

99097081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99097081 is an equidigital number, since it uses as much as digits as its factorization.

99097081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 99097081 is about 9954.7516794745. The cubic root of 99097081 is about 462.7576646549.

The spelling of 99097081 in words is "ninety-nine million, ninety-seven thousand, eighty-one".