168993603 has 12 divisors (see below), whose sum is σ = 244281960. Its totient is φ = 112579296.

The previous prime is 168993593. The next prime is 168993653. The reversal of 168993603 is 306399861.

It is not a de Polignac number, because 168993603 - 2⁵ = 168993571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168993653) 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 11 ways as a sum of consecutive naturals, for example, 7543 + ... + 19871.

It is an arithmetic number, because the mean of its divisors is an integer number (20356830).

Almost surely, 2^168993603 is an apocalyptic number.

168993603 is a deficient number, since it is larger than the sum of its proper divisors (75288357).

168993603 is a wasteful number, since it uses less digits than its factorization.

168993603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13858 (or 13855 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 168993603 is about 12999.7539592102. The cubic root of 168993603 is about 552.8705054273.

It can be divided in two parts, 16899 and 3603, that added together give a palindrome (20502).

The spelling of 168993603 in words is "one hundred sixty-eight million, nine hundred ninety-three thousand, six hundred three".