143520649 has 2 divisors, whose sum is σ = 143520650. Its totient is φ = 143520648.

The previous prime is 143520631. The next prime is 143520653. The reversal of 143520649 is 946025341.

It is a happy number.

143520649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81000000 + 62520649 = 9000^2 + 7907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143520649 is a prime.

It is not a weakly prime, because it can be changed into another prime (143520659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71760324 + 71760325.

It is an arithmetic number, because the mean of its divisors is an integer number (71760325).

Almost surely, 2^143520649 is an apocalyptic number.

It is an amenable number.

143520649 is a deficient number, since it is larger than the sum of its proper divisors (1).

143520649 is an equidigital number, since it uses as much as digits as its factorization.

143520649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 143520649 is about 11980.0103923160. The cubic root of 143520649 is about 523.5660327569.

The spelling of 143520649 in words is "one hundred forty-three million, five hundred twenty thousand, six hundred forty-nine".