143661137 has 2 divisors, whose sum is σ = 143661138. Its totient is φ = 143661136.

The previous prime is 143661127. The next prime is 143661139. The reversal of 143661137 is 731166341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142659136 + 1002001 = 11944^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 143661137 - 2⁶ = 143661073 is a prime.

Together with 143661139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143661139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71830568 + 71830569.

It is an arithmetic number, because the mean of its divisors is an integer number (71830569).

Almost surely, 2^143661137 is an apocalyptic number.

It is an amenable number.

143661137 is a deficient number, since it is larger than the sum of its proper divisors (1).

143661137 is an equidigital number, since it uses as much as digits as its factorization.

143661137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 143661137 is about 11985.8723921123. The cubic root of 143661137 is about 523.7368113364.

The spelling of 143661137 in words is "one hundred forty-three million, six hundred sixty-one thousand, one hundred thirty-seven".