144099999 has 16 divisors (see below), whose sum is σ = 215686240. Its totient is φ = 95074560.

The previous prime is 144099961. The next prime is 144100001. The reversal of 144099999 is 999990441.

It is not a de Polignac number, because 144099999 - 2¹⁷ = 143968927 is a prime.

It is a Duffinian number.

144099999 is a modest number, since divided by 99999 gives 1440 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144099919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24892 + ... + 30129.

It is an arithmetic number, because the mean of its divisors is an integer number (13480390).

Almost surely, 2^144099999 is an apocalyptic number.

144099999 is a deficient number, since it is larger than the sum of its proper divisors (71586241).

144099999 is an equidigital number, since it uses as much as digits as its factorization.

144099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55127 (or 55121 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 144099999 is about 12004.1659018859. The cubic root of 144099999 is about 524.2695801742.

The spelling of 144099999 in words is "one hundred forty-four million, ninety-nine thousand, nine hundred ninety-nine".