68978985 has 32 divisors (see below), whose sum is σ = 112803840. Its totient is φ = 35985600.

The previous prime is 68978977. The next prime is 68979007. The reversal of 68978985 is 58987986.

It is a happy number.

It is not a de Polignac number, because 68978985 - 2³ = 68978977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254400 + ... + 254670.

It is an arithmetic number, because the mean of its divisors is an integer number (3525120).

Almost surely, 2^68978985 is an apocalyptic number.

It is an amenable number.

68978985 is a deficient number, since it is larger than the sum of its proper divisors (43824855).

68978985 is a wasteful number, since it uses less digits than its factorization.

68978985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589.

The product of its digits is 8709120, while the sum is 60.

The square root of 68978985 is about 8305.3588122368. The cubic root of 68978985 is about 410.1149489315.

Subtracting from 68978985 its reverse (58987986), we obtain a palindrome (9990999).

The spelling of 68978985 in words is "sixty-eight million, nine hundred seventy-eight thousand, nine hundred eighty-five".