68540677 has 4 divisors (see below), whose sum is σ = 68784876. Its totient is φ = 68296480.

The previous prime is 68540671. The next prime is 68540683. The reversal of 68540677 is 77604586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77604586 = 2 ⋅38802293.

It is an interprime number because it is at equal distance from previous prime (68540671) and next prime (68540683).

It can be written as a sum of positive squares in 2 ways, for example, as 18541636 + 49999041 = 4306^2 + 7071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68540677 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 (68540671) 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 in 3 ways as a sum of consecutive naturals, for example, 121678 + ... + 122239.

It is an arithmetic number, because the mean of its divisors is an integer number (17196219).

Almost surely, 2^68540677 is an apocalyptic number.

It is an amenable number.

68540677 is a deficient number, since it is larger than the sum of its proper divisors (244199).

68540677 is a wasteful number, since it uses less digits than its factorization.

68540677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244198.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 68540677 is about 8278.9297013563. The cubic root of 68540677 is about 409.2444482957.

The spelling of 68540677 in words is "sixty-eight million, five hundred forty thousand, six hundred seventy-seven".