99997544 has 16 divisors (see below), whose sum is σ = 190570020. Its totient is φ = 49178880.

The previous prime is 99997543. The next prime is 99997571. The reversal of 99997544 is 44579999.

It can be written as a sum of positive squares in 2 ways, for example, as 95844100 + 4153444 = 9790^2 + 2038^2 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99997544.

It is not an unprimeable number, because it can be changed into a prime (99997543) 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, 101969 + ... + 102944.

Almost surely, 2^99997544 is an apocalyptic number.

It is an amenable number.

99997544 is a deficient number, since it is larger than the sum of its proper divisors (90572476).

99997544 is a wasteful number, since it uses less digits than its factorization.

99997544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204980 (or 204976 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 56.

The square root of 99997544 is about 9999.8771992460. The cubic root of 99997544 is about 464.1550834161.

The spelling of 99997544 in words is "ninety-nine million, nine hundred ninety-seven thousand, five hundred forty-four".