68634985 has 8 divisors (see below), whose sum is σ = 82418760. Its totient is φ = 54870144.

The previous prime is 68634971. The next prime is 68634989. The reversal of 68634985 is 58943686.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26020201 + 42614784 = 5101^2 + 6528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68634985 - 2⁷ = 68634857 is a prime.

It is a super-2 number, since 2×68634985² = 9421522331900450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68634989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5109 + ... + 12781.

It is an arithmetic number, because the mean of its divisors is an integer number (10302345).

Almost surely, 2^68634985 is an apocalyptic number.

It is an amenable number.

68634985 is a deficient number, since it is larger than the sum of its proper divisors (13783775).

68634985 is a wasteful number, since it uses less digits than its factorization.

68634985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467.

The product of its digits is 1244160, while the sum is 49.

The square root of 68634985 is about 8284.6234072527. The cubic root of 68634985 is about 409.4320611563.

The spelling of 68634985 in words is "sixty-eight million, six hundred thirty-four thousand, nine hundred eighty-five".