1646542343 has 2 divisors, whose sum is σ = 1646542344. Its totient is φ = 1646542342.

The previous prime is 1646542321. The next prime is 1646542379. The reversal of 1646542343 is 3432456461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1646542343 - 2²⁴ = 1629765127 is a prime.

It is a super-2 number, since 2×1646542343² = 5422203374583859298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646542297 and 1646542306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646542243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823271171 + 823271172.

It is an arithmetic number, because the mean of its divisors is an integer number (823271172).

Almost surely, 2^1646542343 is an apocalyptic number.

1646542343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646542343 is an equidigital number, since it uses as much as digits as its factorization.

1646542343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 38.

The square root of 1646542343 is about 40577.6088871683. The cubic root of 1646542343 is about 1180.8397601288.

The spelling of 1646542343 in words is "one billion, six hundred forty-six million, five hundred forty-two thousand, three hundred forty-three".