68162909 has 2 divisors, whose sum is σ = 68162910. Its totient is φ = 68162908.

The previous prime is 68162839. The next prime is 68162923. The reversal of 68162909 is 90926186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58951684 + 9211225 = 7678^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 68162909 - 2¹² = 68158813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68162989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34081454 + 34081455.

It is an arithmetic number, because the mean of its divisors is an integer number (34081455).

Almost surely, 2^68162909 is an apocalyptic number.

It is an amenable number.

68162909 is a deficient number, since it is larger than the sum of its proper divisors (1).

68162909 is an equidigital number, since it uses as much as digits as its factorization.

68162909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 68162909 is about 8256.0831512286. The cubic root of 68162909 is about 408.4912004145.

The spelling of 68162909 in words is "sixty-eight million, one hundred sixty-two thousand, nine hundred nine".