102785017 has 2 divisors, whose sum is σ = 102785018. Its totient is φ = 102785016.

The previous prime is 102784987. The next prime is 102785027. The reversal of 102785017 is 710587201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98188281 + 4596736 = 9909^2 + 2144^2 .

It is an emirp because it is prime and its reverse (710587201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102785017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102785017.

It is not a weakly prime, because it can be changed into another prime (102785027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51392508 + 51392509.

It is an arithmetic number, because the mean of its divisors is an integer number (51392509).

Almost surely, 2^102785017 is an apocalyptic number.

It is an amenable number.

102785017 is a deficient number, since it is larger than the sum of its proper divisors (1).

102785017 is an equidigital number, since it uses as much as digits as its factorization.

102785017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 102785017 is about 10138.2945804509. The cubic root of 102785017 is about 468.4284571270.

The spelling of 102785017 in words is "one hundred two million, seven hundred eighty-five thousand, seventeen".