99999756 has 18 divisors (see below), whose sum is σ = 252777252. Its totient is φ = 33333240.

The previous prime is 99999721. The next prime is 99999773. The reversal of 99999756 is 65799999.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 99999693 and 99999702.

It is an unprimeable number.

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, 1388850 + ... + 1388921.

Almost surely, 2^99999756 is an apocalyptic number.

It is an amenable number.

99999756 is an abundant number, since it is smaller than the sum of its proper divisors (152777496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999756 is a wasteful number, since it uses less digits than its factorization.

99999756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777781 (or 2777776 counting only the distinct ones).

The product of its digits is 12400290, while the sum is 63.

The square root of 99999756 is about 9999.9877999926. The cubic root of 99999756 is about 464.1585058451.

The spelling of 99999756 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred fifty-six".