391063 has 2 divisors, whose sum is σ = 391064. Its totient is φ = 391062.

The previous prime is 391057. The next prime is 391067. The reversal of 391063 is 360193.

It is a strong prime.

It is an emirp because it is prime and its reverse (360193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 391063 - 2⁵ = 391031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195531 + 195532.

It is an arithmetic number, because the mean of its divisors is an integer number (195532).

2³⁹¹⁰⁶³ is an apocalyptic number.

391063 is a deficient number, since it is larger than the sum of its proper divisors (1).

391063 is an equidigital number, since it uses as much as digits as its factorization.

391063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 391063 is about 625.3503018309. The cubic root of 391063 is about 73.1277552715.

The spelling of 391063 in words is "three hundred ninety-one thousand, sixty-three".