68042069 has 4 divisors (see below), whose sum is σ = 69000480. Its totient is φ = 67083660.

The previous prime is 68042057. The next prime is 68042071. The reversal of 68042069 is 96024086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96024086 = 2 ⋅48012043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68042069 is a prime.

It is a super-2 number, since 2×68042069² = 9259446307601522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68042099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479099 + ... + 479240.

It is an arithmetic number, because the mean of its divisors is an integer number (17250120).

Almost surely, 2^68042069 is an apocalyptic number.

It is an amenable number.

68042069 is a deficient number, since it is larger than the sum of its proper divisors (958411).

68042069 is an equidigital number, since it uses as much as digits as its factorization.

68042069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958410.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 68042069 is about 8248.7616646379. The cubic root of 68042069 is about 408.2496649713.

The spelling of 68042069 in words is "sixty-eight million, forty-two thousand, sixty-nine".