168623977 has 2 divisors, whose sum is σ = 168623978. Its totient is φ = 168623976.

The previous prime is 168623957. The next prime is 168624007. The reversal of 168623977 is 779326861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166177881 + 2446096 = 12891^2 + 1564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168623977 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168623977.

It is not a weakly prime, because it can be changed into another prime (168623957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84311988 + 84311989.

It is an arithmetic number, because the mean of its divisors is an integer number (84311989).

Almost surely, 2^168623977 is an apocalyptic number.

It is an amenable number.

168623977 is a deficient number, since it is larger than the sum of its proper divisors (1).

168623977 is an equidigital number, since it uses as much as digits as its factorization.

168623977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 168623977 is about 12985.5295232809. The cubic root of 168623977 is about 552.4671282559.

The spelling of 168623977 in words is "one hundred sixty-eight million, six hundred twenty-three thousand, nine hundred seventy-seven".