163949 has 4 divisors (see below), whose sum is σ = 166464. Its totient is φ = 161436.

The previous prime is 163927. The next prime is 163973. The reversal of 163949 is 949361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949361 = 7 ⋅135623.

It is a cyclic number.

It is not a de Polignac number, because 163949 - 2¹² = 159853 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (41616).

2¹⁶³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

163949 is a deficient number, since it is larger than the sum of its proper divisors (2515).

163949 is an equidigital number, since it uses as much as digits as its factorization.

163949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514.

The product of its digits is 5832, while the sum is 32.

The square root of 163949 is about 404.9061619684. The cubic root of 163949 is about 54.7313621986.

The spelling of 163949 in words is "one hundred sixty-three thousand, nine hundred forty-nine".