168903946 has 16 divisors (see below), whose sum is σ = 262702440. Its totient is φ = 81350080.

The previous prime is 168903907. The next prime is 168903949. The reversal of 168903946 is 649309861.

It can be written as a sum of positive squares in 4 ways, for example, as 136539225 + 32364721 = 11685^2 + 5689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168903896 and 168903905.

It is not an unprimeable number, because it can be changed into a prime (168903949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23580 + ... + 29896.

Almost surely, 2^168903946 is an apocalyptic number.

168903946 is a deficient number, since it is larger than the sum of its proper divisors (93798494).

168903946 is a wasteful number, since it uses less digits than its factorization.

168903946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 168903946 is about 12996.3050902939. The cubic root of 168903946 is about 552.7727157702.

The spelling of 168903946 in words is "one hundred sixty-eight million, nine hundred three thousand, nine hundred forty-six".