163689677 has 2 divisors, whose sum is σ = 163689678. Its totient is φ = 163689676.

The previous prime is 163689667. The next prime is 163689679. The reversal of 163689677 is 776986361.

163689677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156475081 + 7214596 = 12509^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 163689677 - 2⁴ = 163689661 is a prime.

Together with 163689679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163689679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81844838 + 81844839.

It is an arithmetic number, because the mean of its divisors is an integer number (81844839).

Almost surely, 2^163689677 is an apocalyptic number.

It is an amenable number.

163689677 is a deficient number, since it is larger than the sum of its proper divisors (1).

163689677 is an equidigital number, since it uses as much as digits as its factorization.

163689677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 163689677 is about 12794.1266603078. The cubic root of 163689677 is about 547.0249023061.

The spelling of 163689677 in words is "one hundred sixty-three million, six hundred eighty-nine thousand, six hundred seventy-seven".