144920889 has 12 divisors (see below), whose sum is σ = 210542436. Its totient is φ = 96054432.

The previous prime is 144920887. The next prime is 144920927. The reversal of 144920889 is 988029441.

It can be written as a sum of positive squares in 2 ways, for example, as 79067664 + 65853225 = 8892^2 + 8115^2 .

It is not a de Polignac number, because 144920889 - 2¹ = 144920887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144920887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44982 + ... + 48095.

It is an arithmetic number, because the mean of its divisors is an integer number (17545203).

Almost surely, 2^144920889 is an apocalyptic number.

It is an amenable number.

144920889 is a deficient number, since it is larger than the sum of its proper divisors (65621547).

144920889 is a wasteful number, since it uses less digits than its factorization.

144920889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93256 (or 93253 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 144920889 is about 12038.3092251362. The cubic root of 144920889 is about 525.2632258242.

The spelling of 144920889 in words is "one hundred forty-four million, nine hundred twenty thousand, eight hundred eighty-nine".