143865649 has 2 divisors, whose sum is σ = 143865650. Its totient is φ = 143865648.

The previous prime is 143865629. The next prime is 143865661. The reversal of 143865649 is 946568341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92025649 + 51840000 = 9593^2 + 7200^2 .

It is an emirp because it is prime and its reverse (946568341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143865649 - 2⁷ = 143865521 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 143865599 and 143865608.

It is not a weakly prime, because it can be changed into another prime (143865629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71932824 + 71932825.

It is an arithmetic number, because the mean of its divisors is an integer number (71932825).

Almost surely, 2^143865649 is an apocalyptic number.

It is an amenable number.

143865649 is a deficient number, since it is larger than the sum of its proper divisors (1).

143865649 is an equidigital number, since it uses as much as digits as its factorization.

143865649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 46.

The square root of 143865649 is about 11994.4007353431. The cubic root of 143865649 is about 523.9852192187.

The spelling of 143865649 in words is "one hundred forty-three million, eight hundred sixty-five thousand, six hundred forty-nine".