144861899 has 12 divisors (see below), whose sum is σ = 179272656. Its totient is φ = 114615072.

The previous prime is 144861881. The next prime is 144861907. The reversal of 144861899 is 998168441.

It is not a de Polignac number, because 144861899 - 2²⁰ = 143813323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144861869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60044 + ... + 62409.

It is an arithmetic number, because the mean of its divisors is an integer number (14939388).

Almost surely, 2^144861899 is an apocalyptic number.

144861899 is a deficient number, since it is larger than the sum of its proper divisors (34410757).

144861899 is a wasteful number, since it uses less digits than its factorization.

144861899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122486 (or 122473 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 144861899 is about 12035.8588808610. The cubic root of 144861899 is about 525.1919467445.

The spelling of 144861899 in words is "one hundred forty-four million, eight hundred sixty-one thousand, eight hundred ninety-nine".