143640061 has 2 divisors, whose sum is σ = 143640062. Its totient is φ = 143640060.

The previous prime is 143640047. The next prime is 143640071. The reversal of 143640061 is 160046341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134676025 + 8964036 = 11605^2 + 2994^2 .

It is a cyclic number.

It is not a de Polignac number, because 143640061 - 2¹⁹ = 143115773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143640041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71820030 + 71820031.

It is an arithmetic number, because the mean of its divisors is an integer number (71820031).

Almost surely, 2^143640061 is an apocalyptic number.

It is an amenable number.

143640061 is a deficient number, since it is larger than the sum of its proper divisors (1).

143640061 is an equidigital number, since it uses as much as digits as its factorization.

143640061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 143640061 is about 11984.9931581124. The cubic root of 143640061 is about 523.7111982464.

The spelling of 143640061 in words is "one hundred forty-three million, six hundred forty thousand, sixty-one".