68978801 has 4 divisors (see below), whose sum is σ = 68995812. Its totient is φ = 68961792.

The previous prime is 68978783. The next prime is 68978821. The reversal of 68978801 is 10887986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10887986 = 2 ⋅5443993.

It can be written as a sum of positive squares in 2 ways, for example, as 2719201 + 66259600 = 1649^2 + 8140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68978801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68978821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505 + ... + 11841.

It is an arithmetic number, because the mean of its divisors is an integer number (17248953).

Almost surely, 2^68978801 is an apocalyptic number.

It is an amenable number.

68978801 is a deficient number, since it is larger than the sum of its proper divisors (17011).

68978801 is a wasteful number, since it uses less digits than its factorization.

68978801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17010.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 68978801 is about 8305.3477350440. The cubic root of 68978801 is about 410.1145842735.

The spelling of 68978801 in words is "sixty-eight million, nine hundred seventy-eight thousand, eight hundred one".