246991 has 4 divisors (see below), whose sum is σ = 248032. Its totient is φ = 245952.

The previous prime is 246979. The next prime is 247001. The reversal of 246991 is 199642.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 246991 - 2¹¹ = 244943 is a prime.

It is a super-2 number, since 2×246991² = 122009108162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (246931) 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 3 ways as a sum of consecutive naturals, for example, 31 + ... + 703.

It is an arithmetic number, because the mean of its divisors is an integer number (62008).

2²⁴⁶⁹⁹¹ is an apocalyptic number.

246991 is a deficient number, since it is larger than the sum of its proper divisors (1041).

246991 is an equidigital number, since it uses as much as digits as its factorization.

246991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its digits is 3888, while the sum is 31.

The square root of 246991 is about 496.9818910182. The cubic root of 246991 is about 62.7422915035.

The spelling of 246991 in words is "two hundred forty-six thousand, nine hundred ninety-one".