99000981 has 8 divisors (see below), whose sum is σ = 146668160. Its totient is φ = 66000636.

The previous prime is 99000977. The next prime is 99000991. The reversal of 99000981 is 18900099.

It is not a de Polignac number, because 99000981 - 2² = 99000977 is a prime.

It is a super-2 number, since 2×99000981² = 19602388477924722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99000991) 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, 1833325 + ... + 1833378.

It is an arithmetic number, because the mean of its divisors is an integer number (18333520).

Almost surely, 2^99000981 is an apocalyptic number.

It is an amenable number.

99000981 is a deficient number, since it is larger than the sum of its proper divisors (47667179).

99000981 is a wasteful number, since it uses less digits than its factorization.

99000981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666712 (or 3666706 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 99000981 is about 9949.9236680489. The cubic root of 99000981 is about 462.6080289165.

It can be divided in two parts, 9900098 and 1, that added together give a palindrome (9900099).

The spelling of 99000981 in words is "ninety-nine million, nine hundred eighty-one", and thus it is an aban number.