143539661 has 8 divisors (see below), whose sum is σ = 153350880. Its totient is φ = 133954128.

The previous prime is 143539651. The next prime is 143539663. The reversal of 143539661 is 166935341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143539661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143539663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55106 + ... + 57651.

It is an arithmetic number, because the mean of its divisors is an integer number (19168860).

Almost surely, 2^143539661 is an apocalyptic number.

It is an amenable number.

143539661 is a deficient number, since it is larger than the sum of its proper divisors (9811219).

143539661 is a wasteful number, since it uses less digits than its factorization.

143539661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112843.

The product of its digits is 58320, while the sum is 38.

The square root of 143539661 is about 11980.8038544999. The cubic root of 143539661 is about 523.5891504476.

The spelling of 143539661 in words is "one hundred forty-three million, five hundred thirty-nine thousand, six hundred sixty-one".