391079 has 8 divisors (see below), whose sum is σ = 428400. Its totient is φ = 354816.

The previous prime is 391073. The next prime is 391103. The reversal of 391079 is 970193.

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 391079 - 2⁴ = 391063 is a prime.

It is a super-3 number, since 3×391079³ = 179438133354558117, which contains 333 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 (391073) 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, 647 + ... + 1095.

It is an arithmetic number, because the mean of its divisors is an integer number (53550).

2³⁹¹⁰⁷⁹ is an apocalyptic number.

391079 is a deficient number, since it is larger than the sum of its proper divisors (37321).

391079 is a wasteful number, since it uses less digits than its factorization.

391079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 391079 is about 625.3630945299. The cubic root of 391079 is about 73.1287525773.

The spelling of 391079 in words is "three hundred ninety-one thousand, seventy-nine".