144531749 has 2 divisors, whose sum is σ = 144531750. Its totient is φ = 144531748.

The previous prime is 144531743. The next prime is 144531767. The reversal of 144531749 is 947135441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88924900 + 55606849 = 9430^2 + 7457^2 .

It is a cyclic number.

It is not a de Polignac number, because 144531749 - 2⁴ = 144531733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144531743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72265874 + 72265875.

It is an arithmetic number, because the mean of its divisors is an integer number (72265875).

Almost surely, 2^144531749 is an apocalyptic number.

It is an amenable number.

144531749 is a deficient number, since it is larger than the sum of its proper divisors (1).

144531749 is an equidigital number, since it uses as much as digits as its factorization.

144531749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 144531749 is about 12022.1357919465. The cubic root of 144531749 is about 524.7926606806.

The spelling of 144531749 in words is "one hundred forty-four million, five hundred thirty-one thousand, seven hundred forty-nine".