68778134 has 4 divisors (see below), whose sum is σ = 103167204. Its totient is φ = 34389066.

The previous prime is 68778133. The next prime is 68778163. The reversal of 68778134 is 43187786.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68778133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17194532 + ... + 17194535.

It is an arithmetic number, because the mean of its divisors is an integer number (25791801).

Almost surely, 2^68778134 is an apocalyptic number.

68778134 is a deficient number, since it is larger than the sum of its proper divisors (34389070).

68778134 is a wasteful number, since it uses less digits than its factorization.

68778134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34389069.

The product of its digits is 225792, while the sum is 44.

The square root of 68778134 is about 8293.2583463920. The cubic root of 68778134 is about 409.7165083695.

The spelling of 68778134 in words is "sixty-eight million, seven hundred seventy-eight thousand, one hundred thirty-four".