99645771 has 8 divisors (see below), whose sum is σ = 132996240. Its totient is φ = 66362912.

The previous prime is 99645761. The next prime is 99645787. The reversal of 99645771 is 17754699.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99645771 - 2⁵ = 99645739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99645771.

It is not an unprimeable number, because it can be changed into a prime (99645701) 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, 13356 + ... + 19433.

It is an arithmetic number, because the mean of its divisors is an integer number (16624530).

Almost surely, 2^99645771 is an apocalyptic number.

99645771 is a deficient number, since it is larger than the sum of its proper divisors (33350469).

99645771 is a wasteful number, since it uses less digits than its factorization.

99645771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33805.

The product of its digits is 476280, while the sum is 48.

The square root of 99645771 is about 9982.2728373853. The cubic root of 99645771 is about 463.6101731632.

The spelling of 99645771 in words is "ninety-nine million, six hundred forty-five thousand, seven hundred seventy-one".