1979418143 has 2 divisors, whose sum is σ = 1979418144. Its totient is φ = 1979418142.

The previous prime is 1979418139. The next prime is 1979418179. The reversal of 1979418143 is 3418149791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1979418143 - 2² = 1979418139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979418643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989709071 + 989709072.

It is an arithmetic number, because the mean of its divisors is an integer number (989709072).

Almost surely, 2^1979418143 is an apocalyptic number.

1979418143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979418143 is an equidigital number, since it uses as much as digits as its factorization.

1979418143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 1979418143 is about 44490.6523103449. The cubic root of 1979418143 is about 1255.5842198817.

The spelling of 1979418143 in words is "one billion, nine hundred seventy-nine million, four hundred eighteen thousand, one hundred forty-three".