648145133 has 2 divisors, whose sum is σ = 648145134. Its totient is φ = 648145132.

The previous prime is 648145093. The next prime is 648145207. The reversal of 648145133 is 331541846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463239529 + 184905604 = 21523^2 + 13598^2 .

It is a cyclic number.

It is not a de Polignac number, because 648145133 - 2⁸ = 648144877 is a prime.

It is a super-2 number, since 2×648145133² = 840184226863175378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 648145093 and 648145102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648145033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324072566 + 324072567.

It is an arithmetic number, because the mean of its divisors is an integer number (324072567).

Almost surely, 2^648145133 is an apocalyptic number.

It is an amenable number.

648145133 is a deficient number, since it is larger than the sum of its proper divisors (1).

648145133 is an equidigital number, since it uses as much as digits as its factorization.

648145133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 648145133 is about 25458.6946444628. The cubic root of 648145133 is about 865.4143416850.

Adding to 648145133 its reverse (331541846), we get a palindrome (979686979).

The spelling of 648145133 in words is "six hundred forty-eight million, one hundred forty-five thousand, one hundred thirty-three".