102920117 has 4 divisors (see below), whose sum is σ = 104862060. Its totient is φ = 100978176.

The previous prime is 102920099. The next prime is 102920123. The reversal of 102920117 is 711029201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711029201 = 13147 ⋅54083.

It can be written as a sum of positive squares in 2 ways, for example, as 92428996 + 10491121 = 9614^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 102920117 - 2²⁰ = 101871541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102920092 and 102920101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102920317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970892 + ... + 970997.

It is an arithmetic number, because the mean of its divisors is an integer number (26215515).

Almost surely, 2^102920117 is an apocalyptic number.

It is an amenable number.

102920117 is a deficient number, since it is larger than the sum of its proper divisors (1941943).

102920117 is an equidigital number, since it uses as much as digits as its factorization.

102920117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941942.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 102920117 is about 10144.9552487924. The cubic root of 102920117 is about 468.6336004433.

Adding to 102920117 its reverse (711029201), we get a palindrome (813949318).

The spelling of 102920117 in words is "one hundred two million, nine hundred twenty thousand, one hundred seventeen".