68517061 has 4 divisors (see below), whose sum is σ = 69040224. Its totient is φ = 67993900.

The previous prime is 68517041. The next prime is 68517067. The reversal of 68517061 is 16071586.

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: 16071586 = 2 ⋅8035793.

It is a cyclic number.

It is not a de Polignac number, because 68517061 - 2⁹ = 68516549 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 (68517067) 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, 261385 + ... + 261646.

It is an arithmetic number, because the mean of its divisors is an integer number (17260056).

Almost surely, 2^68517061 is an apocalyptic number.

It is an amenable number.

68517061 is a deficient number, since it is larger than the sum of its proper divisors (523163).

68517061 is a wasteful number, since it uses less digits than its factorization.

68517061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523162.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 68517061 is about 8277.5033071573. The cubic root of 68517061 is about 409.1974405550.

The spelling of 68517061 in words is "sixty-eight million, five hundred seventeen thousand, sixty-one".