168209977 has 8 divisors (see below), whose sum is σ = 181347264. Its totient is φ = 155101008.

The previous prime is 168209963. The next prime is 168209981. The reversal of 168209977 is 779902861.

It is a happy number.

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 168209977 - 2¹¹ = 168207929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168209977.

It is not an unprimeable number, because it can be changed into a prime (168209927) 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, 6198 + ... + 19360.

It is an arithmetic number, because the mean of its divisors is an integer number (22668408).

Almost surely, 2^168209977 is an apocalyptic number.

It is an amenable number.

168209977 is a deficient number, since it is larger than the sum of its proper divisors (13137287).

168209977 is a wasteful number, since it uses less digits than its factorization.

168209977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14159.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 168209977 is about 12969.5789060401. The cubic root of 168209977 is about 552.0146247351.

The spelling of 168209977 in words is "one hundred sixty-eight million, two hundred nine thousand, nine hundred seventy-seven".