99940145 has 8 divisors (see below), whose sum is σ = 123169704. Its totient is φ = 77791104.

The previous prime is 99940121. The next prime is 99940151. The reversal of 99940145 is 54104999.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28858384 + 71081761 = 5372^2 + 8431^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99940145 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 269924 + ... + 270293.

It is an arithmetic number, because the mean of its divisors is an integer number (15396213).

Almost surely, 2^99940145 is an apocalyptic number.

It is an amenable number.

99940145 is a deficient number, since it is larger than the sum of its proper divisors (23229559).

99940145 is a wasteful number, since it uses less digits than its factorization.

99940145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540259.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 99940145 is about 9997.0068020383. The cubic root of 99940145 is about 464.0662574452.

The spelling of 99940145 in words is "ninety-nine million, nine hundred forty thousand, one hundred forty-five".