391463 has 4 divisors (see below), whose sum is σ = 399840. Its totient is φ = 383088.

The previous prime is 391453. The next prime is 391487. The reversal of 391463 is 364193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 391463 - 2⁶ = 391399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4118 + ... + 4211.

It is an arithmetic number, because the mean of its divisors is an integer number (99960).

2³⁹¹⁴⁶³ is an apocalyptic number.

391463 is a deficient number, since it is larger than the sum of its proper divisors (8377).

391463 is an equidigital number, since it uses as much as digits as its factorization.

391463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376.

The product of its digits is 1944, while the sum is 26.

The square root of 391463 is about 625.6700408362. The cubic root of 391463 is about 73.1526797591.

The spelling of 391463 in words is "three hundred ninety-one thousand, four hundred sixty-three".