1979143 has 2 divisors, whose sum is σ = 1979144. Its totient is φ = 1979142.

The previous prime is 1979141. The next prime is 1979147. The reversal of 1979143 is 3419791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1979143 - 2¹ = 1979141 is a prime.

Together with 1979141, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1979099 and 1979108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989571 + 989572.

It is an arithmetic number, because the mean of its divisors is an integer number (989572).

2^1979143 is an apocalyptic number.

1979143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979143 is an equidigital number, since it uses as much as digits as its factorization.

1979143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 1979143 is about 1406.8201732986. The cubic root of 1979143 is about 125.5526040964.

The spelling of 1979143 in words is "one million, nine hundred seventy-nine thousand, one hundred forty-three".