143871979 has 2 divisors, whose sum is σ = 143871980. Its totient is φ = 143871978.

The previous prime is 143871967. The next prime is 143871989. The reversal of 143871979 is 979178341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143871979 - 2¹³ = 143863787 is a prime.

It is a super-3 number, since 3×143871979³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (143871989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71935989 + 71935990.

It is an arithmetic number, because the mean of its divisors is an integer number (71935990).

Almost surely, 2^143871979 is an apocalyptic number.

143871979 is a deficient number, since it is larger than the sum of its proper divisors (1).

143871979 is an equidigital number, since it uses as much as digits as its factorization.

143871979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 143871979 is about 11994.6646055653. The cubic root of 143871979 is about 523.9929041150.

The spelling of 143871979 in words is "one hundred forty-three million, eight hundred seventy-one thousand, nine hundred seventy-nine".