102684109 has 6 divisors (see below), whose sum is σ = 112867790. Its totient is φ = 93349080.

The previous prime is 102684091. The next prime is 102684119. The reversal of 102684109 is 901486201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72675625 + 30008484 = 8525^2 + 5478^2 .

It is not a de Polignac number, because 102684109 - 2⁷ = 102683981 is a prime.

It is a super-2 number, since 2×102684109² = 21088052482247762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102684119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424194 + ... + 424435.

Almost surely, 2^102684109 is an apocalyptic number.

It is an amenable number.

102684109 is a deficient number, since it is larger than the sum of its proper divisors (10183681).

102684109 is an equidigital number, since it uses as much as digits as its factorization.

102684109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848651 (or 848640 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 102684109 is about 10133.3167817847. The cubic root of 102684109 is about 468.2751155314.

The spelling of 102684109 in words is "one hundred two million, six hundred eighty-four thousand, one hundred nine".