99628811 has 4 divisors (see below), whose sum is σ = 102058824. Its totient is φ = 97198800.

The previous prime is 99628787. The next prime is 99628813. The reversal of 99628811 is 11882699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99628811 - 2¹⁴ = 99612427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99628813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214945 + ... + 1215026.

It is an arithmetic number, because the mean of its divisors is an integer number (25514706).

Almost surely, 2^99628811 is an apocalyptic number.

99628811 is a deficient number, since it is larger than the sum of its proper divisors (2430013).

99628811 is a wasteful number, since it uses less digits than its factorization.

99628811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430012.

The product of its digits is 62208, while the sum is 44.

The square root of 99628811 is about 9981.4232953021. The cubic root of 99628811 is about 463.5838690709.

The spelling of 99628811 in words is "ninety-nine million, six hundred twenty-eight thousand, eight hundred eleven".