99702081 has 12 divisors (see below), whose sum is σ = 144478308. Its totient is φ = 66253824.

The previous prime is 99702077. The next prime is 99702133. The reversal of 99702081 is 18020799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50126400 + 49575681 = 7080^2 + 7041^2 .

It is not a de Polignac number, because 99702081 - 2² = 99702077 is a prime.

It is a super-2 number, since 2×99702081² = 19881009911461122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (99702011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14880 + ... + 20513.

It is an arithmetic number, because the mean of its divisors is an integer number (12039859).

Almost surely, 2^99702081 is an apocalyptic number.

It is an amenable number.

99702081 is a deficient number, since it is larger than the sum of its proper divisors (44776227).

99702081 is a wasteful number, since it uses less digits than its factorization.

99702081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35712 (or 35709 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 99702081 is about 9985.0929389766. The cubic root of 99702081 is about 463.6974856925.

The spelling of 99702081 in words is "ninety-nine million, seven hundred two thousand, eighty-one".