68978853 has 12 divisors (see below), whose sum is σ = 99792108. Its totient is φ = 45913920.

The previous prime is 68978839. The next prime is 68978857. The reversal of 68978853 is 35887986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41447844 + 27531009 = 6438^2 + 5247^2 .

It is not a de Polignac number, because 68978853 - 2⁵ = 68978821 is a prime.

It is a super-2 number, since 2×68978853² = 9516164322391218, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68978853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68978857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 433 + ... + 11753.

It is an arithmetic number, because the mean of its divisors is an integer number (8316009).

Almost surely, 2^68978853 is an apocalyptic number.

It is an amenable number.

68978853 is a deficient number, since it is larger than the sum of its proper divisors (30813255).

68978853 is a wasteful number, since it uses less digits than its factorization.

68978853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12004 (or 12001 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 68978853 is about 8305.3508655565. The cubic root of 68978853 is about 410.1146873291.

The spelling of 68978853 in words is "sixty-eight million, nine hundred seventy-eight thousand, eight hundred fifty-three".