168920611 has 2 divisors, whose sum is σ = 168920612. Its totient is φ = 168920610.

The previous prime is 168920597. The next prime is 168920617. The reversal of 168920611 is 116029861.

It is a strong prime.

It is an emirp because it is prime and its reverse (116029861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168920611 is a prime.

It is a super-2 number, since 2×168920611² = 57068345641226642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168920617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84460305 + 84460306.

It is an arithmetic number, because the mean of its divisors is an integer number (84460306).

Almost surely, 2^168920611 is an apocalyptic number.

168920611 is a deficient number, since it is larger than the sum of its proper divisors (1).

168920611 is an equidigital number, since it uses as much as digits as its factorization.

168920611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 168920611 is about 12996.9462182468. The cubic root of 168920611 is about 552.7908950462.

The spelling of 168920611 in words is "one hundred sixty-eight million, nine hundred twenty thousand, six hundred eleven".