1002205117 has 2 divisors, whose sum is σ = 1002205118. Its totient is φ = 1002205116.

The previous prime is 1002205091. The next prime is 1002205147. The reversal of 1002205117 is 7115022001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575328196 + 426876921 = 23986^2 + 20661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002205117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002205094 and 1002205103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002205147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501102558 + 501102559.

It is an arithmetic number, because the mean of its divisors is an integer number (501102559).

Almost surely, 2^1002205117 is an apocalyptic number.

It is an amenable number.

1002205117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002205117 is an equidigital number, since it uses as much as digits as its factorization.

1002205117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1002205117 is about 31657.6233631017. The cubic root of 1002205117 is about 1000.7344993786.

Adding to 1002205117 its reverse (7115022001), we get a palindrome (8117227118).

The spelling of 1002205117 in words is "one billion, two million, two hundred five thousand, one hundred seventeen".