99681833 has 4 divisors (see below), whose sum is σ = 102897408. Its totient is φ = 96466260.

The previous prime is 99681797. The next prime is 99681851. The reversal of 99681833 is 33818699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99681833 - 2⁸ = 99681577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99681853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607741 + ... + 1607802.

It is an arithmetic number, because the mean of its divisors is an integer number (25724352).

Almost surely, 2^99681833 is an apocalyptic number.

It is an amenable number.

99681833 is a deficient number, since it is larger than the sum of its proper divisors (3215575).

99681833 is a wasteful number, since it uses less digits than its factorization.

99681833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215574.

The product of its digits is 279936, while the sum is 47.

The square root of 99681833 is about 9984.0789760498. The cubic root of 99681833 is about 463.6660935615. Note that the first 3 decimals are identical.

The spelling of 99681833 in words is "ninety-nine million, six hundred eighty-one thousand, eight hundred thirty-three".