144121309 has 2 divisors, whose sum is σ = 144121310. Its totient is φ = 144121308.

The previous prime is 144121303. The next prime is 144121321. The reversal of 144121309 is 903121441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100600900 + 43520409 = 10030^2 + 6597^2 .

It is a cyclic number.

It is not a de Polignac number, because 144121309 - 2⁵ = 144121277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144121303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72060654 + 72060655.

It is an arithmetic number, because the mean of its divisors is an integer number (72060655).

Almost surely, 2^144121309 is an apocalyptic number.

It is an amenable number.

144121309 is a deficient number, since it is larger than the sum of its proper divisors (1).

144121309 is an equidigital number, since it uses as much as digits as its factorization.

144121309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 144121309 is about 12005.0534775985. The cubic root of 144121309 is about 524.2954224924.

The spelling of 144121309 in words is "one hundred forty-four million, one hundred twenty-one thousand, three hundred nine".