46991 has 8 divisors (see below), whose sum is σ = 55200. Its totient is φ = 39984.

The previous prime is 46957. The next prime is 46993. The reversal of 46991 is 19964.

It is a de Polignac number, because none of the positive numbers 2^k-46991 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275 + ... + 411.

It is an arithmetic number, because the mean of its divisors is an integer number (6900).

2⁴⁶⁹⁹¹ is an apocalyptic number.

46991 is a deficient number, since it is larger than the sum of its proper divisors (8209).

46991 is an equidigital number, since it uses as much as digits as its factorization.

46991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 144 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 46991 is about 216.7740759408. The cubic root of 46991 is about 36.0859571483.

The spelling of 46991 in words is "forty-six thousand, nine hundred ninety-one".