68978377 has 8 divisors (see below), whose sum is σ = 74349576. Its totient is φ = 63616512.

The previous prime is 68978369. The next prime is 68978383. The reversal of 68978377 is 77387986.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 68873401 = 324^2 + 8299^2 .

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 68978377 - 2³ = 68978369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68978347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24633 + ... + 27289.

It is an arithmetic number, because the mean of its divisors is an integer number (9293697).

Almost surely, 2^68978377 is an apocalyptic number.

It is an amenable number.

68978377 is a deficient number, since it is larger than the sum of its proper divisors (5371199).

68978377 is a wasteful number, since it uses less digits than its factorization.

68978377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667.

The product of its digits is 3556224, while the sum is 55.

The square root of 68978377 is about 8305.3222092824. The cubic root of 68978377 is about 410.1137439722.

The spelling of 68978377 in words is "sixty-eight million, nine hundred seventy-eight thousand, three hundred seventy-seven".