143211979 has 2 divisors, whose sum is σ = 143211980. Its totient is φ = 143211978.

The previous prime is 143211923. The next prime is 143211997. The reversal of 143211979 is 979112341.

143211979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (143211997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (979112341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143211979 - 2⁷ = 143211851 is a prime.

It is not a weakly prime, because it can be changed into another prime (143211779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71605989 + 71605990.

It is an arithmetic number, because the mean of its divisors is an integer number (71605990).

Almost surely, 2^143211979 is an apocalyptic number.

143211979 is a deficient number, since it is larger than the sum of its proper divisors (1).

143211979 is an equidigital number, since it uses as much as digits as its factorization.

143211979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 143211979 is about 11967.1207481165. The cubic root of 143211979 is about 523.1904186909.

The spelling of 143211979 in words is "one hundred forty-three million, two hundred eleven thousand, nine hundred seventy-nine".