68908061 has 4 divisors (see below), whose sum is σ = 68948124. Its totient is φ = 68868000.

The previous prime is 68908057. The next prime is 68908111. The reversal of 68908061 is 16080986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16080986 = 2 ⋅8040493.

It can be written as a sum of positive squares in 2 ways, for example, as 38316100 + 30591961 = 6190^2 + 5531^2 .

It is a cyclic number.

It is not a de Polignac number, because 68908061 - 2² = 68908057 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 (68908001) 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, 17330 + ... + 20931.

It is an arithmetic number, because the mean of its divisors is an integer number (17237031).

Almost surely, 2^68908061 is an apocalyptic number.

It is an amenable number.

68908061 is a deficient number, since it is larger than the sum of its proper divisors (40063).

68908061 is a wasteful number, since it uses less digits than its factorization.

68908061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40062.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 68908061 is about 8301.0879407461. The cubic root of 68908061 is about 409.9743410474.

The spelling of 68908061 in words is "sixty-eight million, nine hundred eight thousand, sixty-one".