99681261 has 8 divisors (see below), whose sum is σ = 133049664. Its totient is φ = 66383520.

The previous prime is 99681247. The next prime is 99681271. The reversal of 99681261 is 16218699.

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

It is not a de Polignac number, because 99681261 - 2⁵ = 99681229 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99681221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14280 + ... + 20081.

It is an arithmetic number, because the mean of its divisors is an integer number (16631208).

Almost surely, 2^99681261 is an apocalyptic number.

It is an amenable number.

99681261 is a deficient number, since it is larger than the sum of its proper divisors (33368403).

99681261 is a wasteful number, since it uses less digits than its factorization.

99681261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35331.

The product of its digits is 46656, while the sum is 42.

The square root of 99681261 is about 9984.0503304020. The cubic root of 99681261 is about 463.6652066814.

The spelling of 99681261 in words is "ninety-nine million, six hundred eighty-one thousand, two hundred sixty-one".