1670340443 has 2 divisors, whose sum is σ = 1670340444. Its totient is φ = 1670340442.

The previous prime is 1670340439. The next prime is 1670340499. The reversal of 1670340443 is 3440430761.

It is a weak prime.

It is an emirp because it is prime and its reverse (3440430761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1670340443 - 2² = 1670340439 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670340433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835170221 + 835170222.

It is an arithmetic number, because the mean of its divisors is an integer number (835170222).

Almost surely, 2^1670340443 is an apocalyptic number.

1670340443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670340443 is an equidigital number, since it uses as much as digits as its factorization.

1670340443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 1670340443 is about 40869.7986660076. The cubic root of 1670340443 is about 1186.5016108944.

The spelling of 1670340443 in words is "one billion, six hundred seventy million, three hundred forty thousand, four hundred forty-three".