99220747 has 4 divisors (see below), whose sum is σ = 99352576. Its totient is φ = 99088920.

The previous prime is 99220733. The next prime is 99220757. The reversal of 99220747 is 74702299.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99220747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99220757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64779 + ... + 66292.

It is an arithmetic number, because the mean of its divisors is an integer number (24838144).

Almost surely, 2^99220747 is an apocalyptic number.

99220747 is a deficient number, since it is larger than the sum of its proper divisors (131829).

99220747 is a wasteful number, since it uses less digits than its factorization.

99220747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131828.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 99220747 is about 9960.9611484033. The cubic root of 99220747 is about 462.9500806846.

The spelling of 99220747 in words is "ninety-nine million, two hundred twenty thousand, seven hundred forty-seven".