1642808953 has 2 divisors, whose sum is σ = 1642808954. Its totient is φ = 1642808952.

The previous prime is 1642808941. The next prime is 1642809013. The reversal of 1642808953 is 3598082461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1523497024 + 119311929 = 39032^2 + 10923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642808953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642808933) 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, 821404476 + 821404477.

It is an arithmetic number, because the mean of its divisors is an integer number (821404477).

Almost surely, 2^1642808953 is an apocalyptic number.

It is an amenable number.

1642808953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642808953 is an equidigital number, since it uses as much as digits as its factorization.

1642808953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1642808953 is about 40531.5797002782. The cubic root of 1642808953 is about 1179.9466012894.

The spelling of 1642808953 in words is "one billion, six hundred forty-two million, eight hundred eight thousand, nine hundred fifty-three".