99673081 has 8 divisors (see below), whose sum is σ = 100418760. Its totient is φ = 98930688.

The previous prime is 99673051. The next prime is 99673109. The reversal of 99673081 is 18037699.

99673081 = 7059² + 7060².

It can be written as a sum of positive squares in 4 ways, for example, as 49843600 + 49829481 = 7060^2 + 7059^2 .

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 99673081 - 2⁷ = 99672953 is a prime.

It is a super-2 number, since 2×99673081² = 19869446152065122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99673051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99475 + ... + 100471.

It is an arithmetic number, because the mean of its divisors is an integer number (12552345).

Almost surely, 2^99673081 is an apocalyptic number.

99673081 is the 7060-th centered square number.

It is an amenable number.

99673081 is a deficient number, since it is larger than the sum of its proper divisors (745679).

99673081 is a wasteful number, since it uses less digits than its factorization.

99673081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 99673081 is about 9983.6406686138. The cubic root of 99673081 is about 463.6525233040.

The spelling of 99673081 in words is "ninety-nine million, six hundred seventy-three thousand, eighty-one".