1949879143 has 2 divisors, whose sum is σ = 1949879144. Its totient is φ = 1949879142.

The previous prime is 1949879131. The next prime is 1949879179. The reversal of 1949879143 is 3419789491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1949879143 - 2⁵ = 1949879111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949879443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974939571 + 974939572.

It is an arithmetic number, because the mean of its divisors is an integer number (974939572).

Almost surely, 2^1949879143 is an apocalyptic number.

1949879143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949879143 is an equidigital number, since it uses as much as digits as its factorization.

1949879143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 1949879143 is about 44157.4358743802. The cubic root of 1949879143 is about 1249.3071665631.

The spelling of 1949879143 in words is "one billion, nine hundred forty-nine million, eight hundred seventy-nine thousand, one hundred forty-three".