68378437 has 8 divisors (see below), whose sum is σ = 72538200. Its totient is φ = 64233984.

The previous prime is 68378419. The next prime is 68378441. The reversal of 68378437 is 73487386.

It can be written as a sum of positive squares in 4 ways, for example, as 5239521 + 63138916 = 2289^2 + 7946^2 .

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 68378437 - 2⁷ = 68378309 is a prime.

It is a super-2 number, since 2×68378437² = 9351221293125938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68378477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6139 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (9067275).

Almost surely, 2^68378437 is an apocalyptic number.

It is an amenable number.

68378437 is a deficient number, since it is larger than the sum of its proper divisors (4159763).

68378437 is a wasteful number, since it uses less digits than its factorization.

68378437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655.

The product of its digits is 677376, while the sum is 46.

The square root of 68378437 is about 8269.1255281317. The cubic root of 68378437 is about 408.9212909198.

The spelling of 68378437 in words is "sixty-eight million, three hundred seventy-eight thousand, four hundred thirty-seven".