99445 has 4 divisors (see below), whose sum is σ = 119340. Its totient is φ = 79552.

The previous prime is 99439. The next prime is 99469. The reversal of 99445 is 54499.

99445 = T₁₃₆ + T₁₃₇ + ... + T₁₄₅.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 30276 = 263^2 + 174^2 .

It is a cyclic number.

It is not a de Polignac number, because 99445 - 2⁷ = 99317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9940 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (29835).

2⁹⁹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

99445 is a deficient number, since it is larger than the sum of its proper divisors (19895).

99445 is a wasteful number, since it uses less digits than its factorization.

99445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19894.

The product of its digits is 6480, while the sum is 31.

The square root of 99445 is about 315.3490129999. The cubic root of 99445 is about 46.3298595927.

The spelling of 99445 in words is "ninety-nine thousand, four hundred forty-five".