99896643 has 36 divisors (see below), whose sum is σ = 183121848. Its totient is φ = 51891840.

The previous prime is 99896639. The next prime is 99896651. The reversal of 99896643 is 34669899.

It is a happy number.

It is not a de Polignac number, because 99896643 - 2² = 99896639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99896643.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99896443) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5446 + ... + 15147.

It is an arithmetic number, because the mean of its divisors is an integer number (5086718).

Almost surely, 2^99896643 is an apocalyptic number.

99896643 is a deficient number, since it is larger than the sum of its proper divisors (83225205).

99896643 is a wasteful number, since it uses less digits than its factorization.

99896643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20624 (or 20614 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 99896643 is about 9994.8308139758. The cubic root of 99896643 is about 463.9989146700.

The spelling of 99896643 in words is "ninety-nine million, eight hundred ninety-six thousand, six hundred forty-three".