1144856729 has 2 divisors, whose sum is σ = 1144856730. Its totient is φ = 1144856728.

The previous prime is 1144856719. The next prime is 1144856747. The reversal of 1144856729 is 9276584411.

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., 1138927504 + 5929225 = 33748^2 + 2435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144856729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144856719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572428364 + 572428365.

It is an arithmetic number, because the mean of its divisors is an integer number (572428365).

Almost surely, 2^1144856729 is an apocalyptic number.

It is an amenable number.

1144856729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144856729 is an equidigital number, since it uses as much as digits as its factorization.

1144856729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 1144856729 is about 33835.7315422617. The cubic root of 1144856729 is about 1046.1253199586.

The spelling of 1144856729 in words is "one billion, one hundred forty-four million, eight hundred fifty-six thousand, seven hundred twenty-nine".