99987345 has 32 divisors (see below), whose sum is σ = 178295040. Its totient is φ = 53164800.

The previous prime is 99987343. The next prime is 99987373. The reversal of 99987345 is 54378999.

It is not a de Polignac number, because 99987345 - 2¹ = 99987343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99987291 and 99987300.

It is not an unprimeable number, because it can be changed into a prime (99987343) 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 31 ways as a sum of consecutive naturals, for example, 53212 + ... + 55058.

It is an arithmetic number, because the mean of its divisors is an integer number (5571720).

Almost surely, 2^99987345 is an apocalyptic number.

It is an amenable number.

99987345 is a deficient number, since it is larger than the sum of its proper divisors (78307695).

99987345 is a wasteful number, since it uses less digits than its factorization.

99987345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262 (or 2256 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 99987345 is about 9999.3672299801. The cubic root of 99987345 is about 464.1393027664.

The spelling of 99987345 in words is "ninety-nine million, nine hundred eighty-seven thousand, three hundred forty-five".