142113689 has 2 divisors, whose sum is σ = 142113690. Its totient is φ = 142113688.

The previous prime is 142113637. The next prime is 142113701. The reversal of 142113689 is 986311241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86118400 + 55995289 = 9280^2 + 7483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142113689 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142113089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71056844 + 71056845.

It is an arithmetic number, because the mean of its divisors is an integer number (71056845).

Almost surely, 2^142113689 is an apocalyptic number.

It is an amenable number.

142113689 is a deficient number, since it is larger than the sum of its proper divisors (1).

142113689 is an equidigital number, since it uses as much as digits as its factorization.

142113689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 142113689 is about 11921.1446178628. The cubic root of 142113689 is about 521.8495392410.

The spelling of 142113689 in words is "one hundred forty-two million, one hundred thirteen thousand, six hundred eighty-nine".