163994249 has 8 divisors (see below), whose sum is σ = 169045128. Its totient is φ = 158976000.

The previous prime is 163994227. The next prime is 163994287. The reversal of 163994249 is 942499361.

It can be written as a sum of positive squares in 4 ways, for example, as 57760000 + 106234249 = 7600^2 + 10307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163994249 - 2²⁴ = 147217033 is a prime.

It is a super-2 number, since 2×163994249² = 53788227410148002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163994549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249 + ... + 18249.

It is an arithmetic number, because the mean of its divisors is an integer number (21130641).

Almost surely, 2^163994249 is an apocalyptic number.

It is an amenable number.

163994249 is a deficient number, since it is larger than the sum of its proper divisors (5050879).

163994249 is a wasteful number, since it uses less digits than its factorization.

163994249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16315.

The product of its digits is 419904, while the sum is 47.

The square root of 163994249 is about 12806.0239340710. The cubic root of 163994249 is about 547.3639691795.

The spelling of 163994249 in words is "one hundred sixty-three million, nine hundred ninety-four thousand, two hundred forty-nine".