139864009 has 8 divisors (see below), whose sum is σ = 142688000. Its totient is φ = 137068416.

The previous prime is 139864001. The next prime is 139864019. The reversal of 139864009 is 900468931.

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 139864009 - 2³ = 139864001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139864001) 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, 2992 + ... + 16990.

It is an arithmetic number, because the mean of its divisors is an integer number (17836000).

Almost surely, 2^139864009 is an apocalyptic number.

It is an amenable number.

139864009 is a deficient number, since it is larger than the sum of its proper divisors (2823991).

139864009 is a wasteful number, since it uses less digits than its factorization.

139864009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14199.

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

The square root of 139864009 is about 11826.4115013811. The cubic root of 139864009 is about 519.0812289408.

The spelling of 139864009 in words is "one hundred thirty-nine million, eight hundred sixty-four thousand, nine".