143361649 has 2 divisors, whose sum is σ = 143361650. Its totient is φ = 143361648.

The previous prime is 143361607. The next prime is 143361653. The reversal of 143361649 is 946163341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140849424 + 2512225 = 11868^2 + 1585^2 .

It is an emirp because it is prime and its reverse (946163341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143361649 is a prime.

It is not a weakly prime, because it can be changed into another prime (143361679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71680824 + 71680825.

It is an arithmetic number, because the mean of its divisors is an integer number (71680825).

Almost surely, 2^143361649 is an apocalyptic number.

It is an amenable number.

143361649 is a deficient number, since it is larger than the sum of its proper divisors (1).

143361649 is an equidigital number, since it uses as much as digits as its factorization.

143361649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 143361649 is about 11973.3724990080. The cubic root of 143361649 is about 523.3726163146.

The spelling of 143361649 in words is "one hundred forty-three million, three hundred sixty-one thousand, six hundred forty-nine".