156668143 has 2 divisors, whose sum is σ = 156668144. Its totient is φ = 156668142.

The previous prime is 156668117. The next prime is 156668189. The reversal of 156668143 is 341866651.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156668143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156668096 and 156668105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156668843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78334071 + 78334072.

It is an arithmetic number, because the mean of its divisors is an integer number (78334072).

Almost surely, 2^156668143 is an apocalyptic number.

156668143 is a deficient number, since it is larger than the sum of its proper divisors (1).

156668143 is an equidigital number, since it uses as much as digits as its factorization.

156668143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 156668143 is about 12516.7145449595. The cubic root of 156668143 is about 539.0887041741.

The spelling of 156668143 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, one hundred forty-three".