1645348123 has 2 divisors, whose sum is σ = 1645348124. Its totient is φ = 1645348122.

The previous prime is 1645348069. The next prime is 1645348127. The reversal of 1645348123 is 3218435461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1645348123 - 2¹³ = 1645339931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1645348127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822674061 + 822674062.

It is an arithmetic number, because the mean of its divisors is an integer number (822674062).

Almost surely, 2^1645348123 is an apocalyptic number.

1645348123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645348123 is an equidigital number, since it uses as much as digits as its factorization.

1645348123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 1645348123 is about 40562.8909595951. The cubic root of 1645348123 is about 1180.5542074914.

The spelling of 1645348123 in words is "one billion, six hundred forty-five million, three hundred forty-eight thousand, one hundred twenty-three".