1645484839 has 2 divisors, whose sum is σ = 1645484840. Its totient is φ = 1645484838.

The previous prime is 1645484809. The next prime is 1645484861. The reversal of 1645484839 is 9384845461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1645484839 - 2¹¹ = 1645482791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645484809) 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, 822742419 + 822742420.

It is an arithmetic number, because the mean of its divisors is an integer number (822742420).

Almost surely, 2^1645484839 is an apocalyptic number.

1645484839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645484839 is an equidigital number, since it uses as much as digits as its factorization.

1645484839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 52.

The square root of 1645484839 is about 40564.5761595015. The cubic root of 1645484839 is about 1180.5869049647.

The spelling of 1645484839 in words is "one billion, six hundred forty-five million, four hundred eighty-four thousand, eight hundred thirty-nine".