144912769 has 2 divisors, whose sum is σ = 144912770. Its totient is φ = 144912768.

The previous prime is 144912767. The next prime is 144912787. The reversal of 144912769 is 967219441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124545600 + 20367169 = 11160^2 + 4513^2 .

It is a cyclic number.

It is not a de Polignac number, because 144912769 - 2¹ = 144912767 is a prime.

It is a super-2 number, since 2×144912769² = 41999421238494722, which contains 22 as substring.

Together with 144912767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (144912767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72456384 + 72456385.

It is an arithmetic number, because the mean of its divisors is an integer number (72456385).

Almost surely, 2^144912769 is an apocalyptic number.

It is an amenable number.

144912769 is a deficient number, since it is larger than the sum of its proper divisors (1).

144912769 is an equidigital number, since it uses as much as digits as its factorization.

144912769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 144912769 is about 12037.9719637487. The cubic root of 144912769 is about 525.2534153751.

The spelling of 144912769 in words is "one hundred forty-four million, nine hundred twelve thousand, seven hundred sixty-nine".