139282609 has 8 divisors (see below), whose sum is σ = 141680000. Its totient is φ = 136901232.

The previous prime is 139282601. The next prime is 139282631. The reversal of 139282609 is 906282931.

It is a happy number.

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 139282609 - 2³ = 139282601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139282601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14242 + ... + 21940.

It is an arithmetic number, because the mean of its divisors is an integer number (17710000).

Almost surely, 2^139282609 is an apocalyptic number.

It is an amenable number.

139282609 is a deficient number, since it is larger than the sum of its proper divisors (2397391).

139282609 is an equidigital number, since it uses as much as digits as its factorization.

139282609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 139282609 is about 11801.8053279996. The cubic root of 139282609 is about 518.3609746210.

The spelling of 139282609 in words is "one hundred thirty-nine million, two hundred eighty-two thousand, six hundred nine".