102239509 has 8 divisors (see below), whose sum is σ = 105944960. Its totient is φ = 98594496.

The previous prime is 102239497. The next prime is 102239537. The reversal of 102239509 is 905932201.

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

It is a cyclic number.

It is not a de Polignac number, because 102239509 - 2⁷ = 102239381 is a prime.

It is a super-2 number, since 2×102239509² = 20905834401122162, 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 (102239539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11652 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (13243120).

Almost surely, 2^102239509 is an apocalyptic number.

It is an amenable number.

102239509 is a deficient number, since it is larger than the sum of its proper divisors (3705451).

102239509 is an equidigital number, since it uses as much as digits as its factorization.

102239509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30219.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 102239509 is about 10111.3554482077. The cubic root of 102239509 is about 467.5982944107.

The spelling of 102239509 in words is "one hundred two million, two hundred thirty-nine thousand, five hundred nine".