144661885 has 4 divisors (see below), whose sum is σ = 173594268. Its totient is φ = 115729504.

The previous prime is 144661883. The next prime is 144661931. The reversal of 144661885 is 588166441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73462041 + 71199844 = 8571^2 + 8438^2 .

It is a cyclic number.

It is not a de Polignac number, because 144661885 - 2¹ = 144661883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144661883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14466184 + ... + 14466193.

It is an arithmetic number, because the mean of its divisors is an integer number (43398567).

Almost surely, 2^144661885 is an apocalyptic number.

It is an amenable number.

144661885 is a deficient number, since it is larger than the sum of its proper divisors (28932383).

144661885 is an equidigital number, since it uses as much as digits as its factorization.

144661885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28932382.

The product of its digits is 184320, while the sum is 43.

The square root of 144661885 is about 12027.5469236250. The cubic root of 144661885 is about 524.9501207336.

The spelling of 144661885 in words is "one hundred forty-four million, six hundred sixty-one thousand, eight hundred eighty-five".