1253803517 has 2 divisors, whose sum is σ = 1253803518. Its totient is φ = 1253803516.

The previous prime is 1253803501. The next prime is 1253803519. The reversal of 1253803517 is 7153083521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841348036 + 412455481 = 29006^2 + 20309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253803517 - 2⁴ = 1253803501 is a prime.

Together with 1253803519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253803519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626901758 + 626901759.

It is an arithmetic number, because the mean of its divisors is an integer number (626901759).

Almost surely, 2^1253803517 is an apocalyptic number.

It is an amenable number.

1253803517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253803517 is an equidigital number, since it uses as much as digits as its factorization.

1253803517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1253803517 is about 35409.0880565993. The cubic root of 1253803517 is about 1078.3088292316.

The spelling of 1253803517 in words is "one billion, two hundred fifty-three million, eight hundred three thousand, five hundred seventeen".