68164469 has 2 divisors, whose sum is σ = 68164470. Its totient is φ = 68164468.

The previous prime is 68164391. The next prime is 68164489. The reversal of 68164469 is 96446186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 15311569 = 7270^2 + 3913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68164469 is a prime.

It is a super-2 number, since 2×68164469² = 9292789668103922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68164489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34082234 + 34082235.

It is an arithmetic number, because the mean of its divisors is an integer number (34082235).

Almost surely, 2^68164469 is an apocalyptic number.

It is an amenable number.

68164469 is a deficient number, since it is larger than the sum of its proper divisors (1).

68164469 is an equidigital number, since it uses as much as digits as its factorization.

68164469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 68164469 is about 8256.1776264807. The cubic root of 68164469 is about 408.4943166812.

The spelling of 68164469 in words is "sixty-eight million, one hundred sixty-four thousand, four hundred sixty-nine".