99999747 has 6 divisors (see below), whose sum is σ = 144444092. Its totient is φ = 66666492.

The previous prime is 99999721. The next prime is 99999773. The reversal of 99999747 is 74799999.

It is an interprime number because it is at equal distance from previous prime (99999721) and next prime (99999773).

It is not a de Polignac number, because 99999747 - 2¹⁹ = 99475459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5555533 + ... + 5555550.

Almost surely, 2^99999747 is an apocalyptic number.

99999747 is a deficient number, since it is larger than the sum of its proper divisors (44444345).

99999747 is a wasteful number, since it uses less digits than its factorization.

99999747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111089 (or 11111086 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 99999747 is about 9999.9873499920. The cubic root of 99999747 is about 464.1584919203.

The spelling of 99999747 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred forty-seven".