68137085 has 4 divisors (see below), whose sum is σ = 81764508. Its totient is φ = 54509664.

The previous prime is 68137073. The next prime is 68137093. The reversal of 68137085 is 58073186.

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 39866596 + 28270489 = 6314^2 + 5317^2 .

It is a cyclic number.

It is not a de Polignac number, because 68137085 - 2⁸ = 68136829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6813704 + ... + 6813713.

It is an arithmetic number, because the mean of its divisors is an integer number (20441127).

Almost surely, 2^68137085 is an apocalyptic number.

It is an amenable number.

68137085 is a deficient number, since it is larger than the sum of its proper divisors (13627423).

68137085 is a wasteful number, since it uses less digits than its factorization.

68137085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13627422.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68137085 is about 8254.5190653363. The cubic root of 68137085 is about 408.4396073054.

The spelling of 68137085 in words is "sixty-eight million, one hundred thirty-seven thousand, eighty-five".