168961910 has 32 divisors (see below), whose sum is σ = 341772480. Its totient is φ = 59672448.

The previous prime is 168961883. The next prime is 168961937. The reversal of 168961910 is 19169861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (168961883) and next prime (168961937).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25265 + ... + 31244.

It is an arithmetic number, because the mean of its divisors is an integer number (10680390).

Almost surely, 2^168961910 is an apocalyptic number.

168961910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168961910 is an abundant number, since it is smaller than the sum of its proper divisors (172810570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168961910 is a wasteful number, since it uses less digits than its factorization.

168961910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56552.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 168961910 is about 12998.5349174436. The cubic root of 168961910 is about 552.8359415541.

The spelling of 168961910 in words is "one hundred sixty-eight million, nine hundred sixty-one thousand, nine hundred ten".