168949790 has 16 divisors (see below), whose sum is σ = 306953712. Its totient is φ = 66947904.

The previous prime is 168949787. The next prime is 168949799. The reversal of 168949790 is 97949861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168949799) 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, 77879 + ... + 80018.

It is an arithmetic number, because the mean of its divisors is an integer number (19184607).

Almost surely, 2^168949790 is an apocalyptic number.

168949790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168949790 is a deficient number, since it is larger than the sum of its proper divisors (138003922).

168949790 is a wasteful number, since it uses less digits than its factorization.

168949790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158011.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 168949790 is about 12998.0687026958. The cubic root of 168949790 is about 552.8227225356.

The spelling of 168949790 in words is "one hundred sixty-eight million, nine hundred forty-nine thousand, seven hundred ninety".