102312309 has 8 divisors (see below), whose sum is σ = 148817952. Its totient is φ = 62007440.

The previous prime is 102312281. The next prime is 102312317. The reversal of 102312309 is 903213201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102312309 - 2⁷ = 102312181 is a prime.

It is a super-2 number, since 2×102312309² = 20935617145822962, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312389) 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 7 ways as a sum of consecutive naturals, for example, 1550154 + ... + 1550219.

It is an arithmetic number, because the mean of its divisors is an integer number (18602244).

Almost surely, 2^102312309 is an apocalyptic number.

It is an amenable number.

102312309 is a deficient number, since it is larger than the sum of its proper divisors (46505643).

102312309 is a wasteful number, since it uses less digits than its factorization.

102312309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100387.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 102312309 is about 10114.9547206105. The cubic root of 102312309 is about 467.7092530791.

The spelling of 102312309 in words is "one hundred two million, three hundred twelve thousand, three hundred nine".