68211277 has 4 divisors (see below), whose sum is σ = 70563420. Its totient is φ = 65859136.

The previous prime is 68211181. The next prime is 68211289. The reversal of 68211277 is 77211286.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35652841 + 32558436 = 5971^2 + 5706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68211277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68211677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176028 + ... + 1176085.

It is an arithmetic number, because the mean of its divisors is an integer number (17640855).

Almost surely, 2^68211277 is an apocalyptic number.

It is an amenable number.

68211277 is a deficient number, since it is larger than the sum of its proper divisors (2352143).

68211277 is a wasteful number, since it uses less digits than its factorization.

68211277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352142.

The product of its digits is 9408, while the sum is 34.

The square root of 68211277 is about 8259.0118658348. The cubic root of 68211277 is about 408.5877985554.

Subtracting 68211277 from its reverse (77211286), we obtain a palindrome (9000009).

The spelling of 68211277 in words is "sixty-eight million, two hundred eleven thousand, two hundred seventy-seven".