102708309 has 24 divisors (see below), whose sum is σ = 151092256. Its totient is φ = 62013600.

The previous prime is 102708289. The next prime is 102708367. The reversal of 102708309 is 903807201.

It is a happy number.

It is not a de Polignac number, because 102708309 - 2⁹ = 102707797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102708709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189579 + ... + 190119.

Almost surely, 2^102708309 is an apocalyptic number.

It is an amenable number.

102708309 is a deficient number, since it is larger than the sum of its proper divisors (48383947).

102708309 is a wasteful number, since it uses less digits than its factorization.

102708309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 102708309 is about 10134.5107923372. The cubic root of 102708309 is about 468.3118994369.

The spelling of 102708309 in words is "one hundred two million, seven hundred eight thousand, three hundred nine".