99880045 has 8 divisors (see below), whose sum is σ = 120284280. Its totient is φ = 79618560.

The previous prime is 99880021. The next prime is 99880051. The reversal of 99880045 is 54008899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139876 + 99740169 = 374^2 + 9987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99880045 - 2¹⁵ = 99847277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99879983 and 99880010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34140 + ... + 36949.

It is an arithmetic number, because the mean of its divisors is an integer number (15035535).

Almost surely, 2^99880045 is an apocalyptic number.

It is an amenable number.

99880045 is a deficient number, since it is larger than the sum of its proper divisors (20404235).

99880045 is a wasteful number, since it uses less digits than its factorization.

99880045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71375.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 99880045 is about 9994.0004502702. Note that the first 3 decimals coincide. The cubic root of 99880045 is about 463.9732151725.

The spelling of 99880045 in words is "ninety-nine million, eight hundred eighty thousand, forty-five".