391007 has 8 divisors (see below), whose sum is σ = 411600. Its totient is φ = 370944.

The previous prime is 390991. The next prime is 391009. The reversal of 391007 is 700193.

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 391007 - 2⁴ = 390991 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 391007.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 391007.

It is not an unprimeable number, because it can be changed into a prime (391009) 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, 2744 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (51450).

2³⁹¹⁰⁰⁷ is an apocalyptic number.

391007 is a deficient number, since it is larger than the sum of its proper divisors (20593).

391007 is a wasteful number, since it uses less digits than its factorization.

391007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 391007 is about 625.3055253234. The cubic root of 391007 is about 73.1242644872.

The spelling of 391007 in words is "three hundred ninety-one thousand, seven".