1670438543 has 2 divisors, whose sum is σ = 1670438544. Its totient is φ = 1670438542.

The previous prime is 1670438537. The next prime is 1670438591. The reversal of 1670438543 is 3458340761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670438543 - 2⁴ = 1670438527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1670438543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670438533) 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, 835219271 + 835219272.

It is an arithmetic number, because the mean of its divisors is an integer number (835219272).

Almost surely, 2^1670438543 is an apocalyptic number.

1670438543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670438543 is an equidigital number, since it uses as much as digits as its factorization.

1670438543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 1670438543 is about 40870.9988011059. The cubic root of 1670438543 is about 1186.5248384007.

The spelling of 1670438543 in words is "one billion, six hundred seventy million, four hundred thirty-eight thousand, five hundred forty-three".