99945 has 12 divisors (see below), whose sum is σ = 173316. Its totient is φ = 53280.

The previous prime is 99929. The next prime is 99961. The reversal of 99945 is 54999.

It is an interprime number because it is at equal distance from previous prime (99929) and next prime (99961).

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 47961 = 228^2 + 219^2 .

It is not a de Polignac number, because 99945 - 2⁴ = 99929 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99945.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (14443).

2⁹⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

99945 is a deficient number, since it is larger than the sum of its proper divisors (73371).

99945 is a wasteful number, since it uses less digits than its factorization.

99945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232 (or 2229 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 99945 is about 316.1407914205. The cubic root of 99945 is about 46.4073771960.

It can be divided in two parts, 9994 and 5, that added together give a palindrome (9999).

The spelling of 99945 in words is "ninety-nine thousand, nine hundred forty-five".