102047317 has 4 divisors (see below), whose sum is σ = 105566220. Its totient is φ = 98528416.

The previous prime is 102047303. The next prime is 102047321. The reversal of 102047317 is 713740201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713740201 = 1109 ⋅643589.

It can be written as a sum of positive squares in 2 ways, for example, as 75359761 + 26687556 = 8681^2 + 5166^2 .

It is a cyclic number.

It is not a de Polignac number, because 102047317 - 2²³ = 93658709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102047291 and 102047300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102047417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759408 + ... + 1759465.

It is an arithmetic number, because the mean of its divisors is an integer number (26391555).

Almost surely, 2^102047317 is an apocalyptic number.

It is an amenable number.

102047317 is a deficient number, since it is larger than the sum of its proper divisors (3518903).

102047317 is an equidigital number, since it uses as much as digits as its factorization.

102047317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518902.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 102047317 is about 10101.8472073181. The cubic root of 102047317 is about 467.3051102216.

Adding to 102047317 its reverse (713740201), we get a palindrome (815787518).

The spelling of 102047317 in words is "one hundred two million, forty-seven thousand, three hundred seventeen".