143835649 has 2 divisors, whose sum is σ = 143835650. Its totient is φ = 143835648.

The previous prime is 143835647. The next prime is 143835661. The reversal of 143835649 is 946538341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143832049 + 3600 = 11993^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 143835649 - 2¹ = 143835647 is a prime.

Together with 143835647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (143835647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71917824 + 71917825.

It is an arithmetic number, because the mean of its divisors is an integer number (71917825).

Almost surely, 2^143835649 is an apocalyptic number.

It is an amenable number.

143835649 is a deficient number, since it is larger than the sum of its proper divisors (1).

143835649 is an equidigital number, since it uses as much as digits as its factorization.

143835649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 143835649 is about 11993.1500866119. The cubic root of 143835649 is about 523.9487948430.

The spelling of 143835649 in words is "one hundred forty-three million, eight hundred thirty-five thousand, six hundred forty-nine".