142983661 has 2 divisors, whose sum is σ = 142983662. Its totient is φ = 142983660.

The previous prime is 142983649. The next prime is 142983667. The reversal of 142983661 is 166389241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 25694761 = 10830^2 + 5069^2 .

It is a cyclic number.

It is not a de Polignac number, because 142983661 - 2⁹ = 142983149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142983667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71491830 + 71491831.

It is an arithmetic number, because the mean of its divisors is an integer number (71491831).

Almost surely, 2^142983661 is an apocalyptic number.

It is an amenable number.

142983661 is a deficient number, since it is larger than the sum of its proper divisors (1).

142983661 is an equidigital number, since it uses as much as digits as its factorization.

142983661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 142983661 is about 11957.5775556757. The cubic root of 142983661 is about 522.9122358938.

The spelling of 142983661 in words is "one hundred forty-two million, nine hundred eighty-three thousand, six hundred sixty-one".