144933821 has 2 divisors, whose sum is σ = 144933822. Its totient is φ = 144933820.

The previous prime is 144933799. The next prime is 144933827. The reversal of 144933821 is 128339441.

144933821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92371321 + 52562500 = 9611^2 + 7250^2 .

It is an emirp because it is prime and its reverse (128339441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144933821 - 2⁶ = 144933757 is a prime.

It is a super-3 number, since 3×144933821³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144933827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72466910 + 72466911.

It is an arithmetic number, because the mean of its divisors is an integer number (72466911).

Almost surely, 2^144933821 is an apocalyptic number.

It is an amenable number.

144933821 is a deficient number, since it is larger than the sum of its proper divisors (1).

144933821 is an equidigital number, since it uses as much as digits as its factorization.

144933821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 144933821 is about 12038.8463317712. The cubic root of 144933821 is about 525.2788492954.

The spelling of 144933821 in words is "one hundred forty-four million, nine hundred thirty-three thousand, eight hundred twenty-one".