99820772 has 6 divisors (see below), whose sum is σ = 174686358. Its totient is φ = 49910384.

The previous prime is 99820771. The next prime is 99820801. The reversal of 99820772 is 27702899.

It can be written as a sum of positive squares in only one way, i.e., 88096996 + 11723776 = 9386^2 + 3424^2 .

It is not an unprimeable number, because it can be changed into a prime (99820771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12477593 + ... + 12477600.

It is an arithmetic number, because the mean of its divisors is an integer number (29114393).

Almost surely, 2^99820772 is an apocalyptic number.

It is an amenable number.

99820772 is a deficient number, since it is larger than the sum of its proper divisors (74865586).

99820772 is a wasteful number, since it uses less digits than its factorization.

99820772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24955197 (or 24955195 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 99820772 is about 9991.0345810632. The cubic root of 99820772 is about 463.8814166347.

The spelling of 99820772 in words is "ninety-nine million, eight hundred twenty thousand, seven hundred seventy-two".