99691000 has 64 divisors (see below), whose sum is σ = 235366560. Its totient is φ = 39520000.

The previous prime is 99690991. The next prime is 99691001. The reversal of 99691000 is 19699.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99691001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130620 + ... + 131380.

Almost surely, 2^99691000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99691000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117683280).

99691000 is an abundant number, since it is smaller than the sum of its proper divisors (135675560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99691000 is a wasteful number, since it uses less digits than its factorization.

99691000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 99691000 is about 9984.5380463995. The cubic root of 99691000 is about 463.6803064382.

The spelling of 99691000 in words is "ninety-nine million, six hundred ninety-one thousand".