1406706643 has 2 divisors, whose sum is σ = 1406706644. Its totient is φ = 1406706642.

The previous prime is 1406706641. The next prime is 1406706647. The reversal of 1406706643 is 3466076041.

It is a weak prime.

It is an emirp because it is prime and its reverse (3466076041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406706643 - 2¹ = 1406706641 is a prime.

Together with 1406706641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1406706641) 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, 703353321 + 703353322.

It is an arithmetic number, because the mean of its divisors is an integer number (703353322).

Almost surely, 2^1406706643 is an apocalyptic number.

1406706643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406706643 is an equidigital number, since it uses as much as digits as its factorization.

1406706643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1406706643 is about 37506.0880791372. The cubic root of 1406706643 is about 1120.4724417885.

The spelling of 1406706643 in words is "one billion, four hundred six million, seven hundred six thousand, six hundred forty-three".