387165009 has 32 divisors (see below), whose sum is σ = 659312640. Its totient is φ = 196214400.

The previous prime is 387164989. The next prime is 387165019. The reversal of 387165009 is 900561783.

It is not a de Polignac number, because 387165009 - 2⁸ = 387164753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (387165019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10969 + ... + 29910.

It is an arithmetic number, because the mean of its divisors is an integer number (20603520).

Almost surely, 2^387165009 is an apocalyptic number.

It is an amenable number.

387165009 is a deficient number, since it is larger than the sum of its proper divisors (272147631).

387165009 is a wasteful number, since it uses less digits than its factorization.

387165009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40941.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 387165009 is about 19676.5090653805. The cubic root of 387165009 is about 728.8397211993.

The spelling of 387165009 in words is "three hundred eighty-seven million, one hundred sixty-five thousand, nine".