46391 has 4 divisors (see below), whose sum is σ = 48432. Its totient is φ = 44352.

The previous prime is 46381. The next prime is 46399. The reversal of 46391 is 19364.

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 46391 - 2⁶ = 46327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2017 = 46391 / (4 + 6 + 3 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46399) 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, 986 + ... + 1031.

It is an arithmetic number, because the mean of its divisors is an integer number (12108).

2⁴⁶³⁹¹ is an apocalyptic number.

46391 is a deficient number, since it is larger than the sum of its proper divisors (2041).

46391 is a wasteful number, since it uses less digits than its factorization.

46391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040.

The product of its digits is 648, while the sum is 23.

The square root of 46391 is about 215.3857005467. The cubic root of 46391 is about 35.9317121114.

The spelling of 46391 in words is "forty-six thousand, three hundred ninety-one".