1979143547 has 2 divisors, whose sum is σ = 1979143548. Its totient is φ = 1979143546.

The previous prime is 1979143487. The next prime is 1979143591. The reversal of 1979143547 is 7453419791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1979143547 - 2¹² = 1979139451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1979143495 and 1979143504.

It is not a weakly prime, because it can be changed into another prime (1979143147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989571773 + 989571774.

It is an arithmetic number, because the mean of its divisors is an integer number (989571774).

Almost surely, 2^1979143547 is an apocalyptic number.

1979143547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979143547 is an equidigital number, since it uses as much as digits as its factorization.

1979143547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 50.

The square root of 1979143547 is about 44487.5662067504. The cubic root of 1979143547 is about 1255.5261566322.

The spelling of 1979143547 in words is "one billion, nine hundred seventy-nine million, one hundred forty-three thousand, five hundred forty-seven".