99684644 has 6 divisors (see below), whose sum is σ = 174448134. Its totient is φ = 49842320.

The previous prime is 99684631. The next prime is 99684647. The reversal of 99684644 is 44648699.

It can be written as a sum of positive squares in only one way, i.e., 67897600 + 31787044 = 8240^2 + 5638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99684592 and 99684601.

It is not an unprimeable number, because it can be changed into a prime (99684647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12460577 + ... + 12460584.

It is an arithmetic number, because the mean of its divisors is an integer number (29074689).

Almost surely, 2^99684644 is an apocalyptic number.

It is an amenable number.

99684644 is a deficient number, since it is larger than the sum of its proper divisors (74763490).

99684644 is a wasteful number, since it uses less digits than its factorization.

99684644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24921165 (or 24921163 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 50.

The square root of 99684644 is about 9984.2197491842. The cubic root of 99684644 is about 463.6704519389.

The spelling of 99684644 in words is "ninety-nine million, six hundred eighty-four thousand, six hundred forty-four".