391077 has 12 divisors (see below), whose sum is σ = 594880. Its totient is φ = 246888.

The previous prime is 391073. The next prime is 391103. The reversal of 391077 is 770193.

It is not a de Polignac number, because 391077 - 2² = 391073 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 391077.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 973 + ... + 1314.

2³⁹¹⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

391077 is a deficient number, since it is larger than the sum of its proper divisors (203803).

391077 is a wasteful number, since it uses less digits than its factorization.

391077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 1323, while the sum is 27.

The square root of 391077 is about 625.3614954568. The cubic root of 391077 is about 73.1286279156.

The spelling of 391077 in words is "three hundred ninety-one thousand, seventy-seven".