168842077 has 4 divisors (see below), whose sum is σ = 171362176. Its totient is φ = 166321980.

The previous prime is 168842071. The next prime is 168842081. The reversal of 168842077 is 770248861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 770248861 = 733 ⋅1050817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168842077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168842071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259949 + ... + 1260082.

It is an arithmetic number, because the mean of its divisors is an integer number (42840544).

Almost surely, 2^168842077 is an apocalyptic number.

It is an amenable number.

168842077 is a deficient number, since it is larger than the sum of its proper divisors (2520099).

168842077 is an equidigital number, since it uses as much as digits as its factorization.

168842077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520098.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 168842077 is about 12993.9246188363. The cubic root of 168842077 is about 552.7052145414.

The spelling of 168842077 in words is "one hundred sixty-eight million, eight hundred forty-two thousand, seventy-seven".