68380749 has 12 divisors (see below), whose sum is σ = 104582556. Its totient is φ = 42905472.

The previous prime is 68380727. The next prime is 68380751. The reversal of 68380749 is 94708386.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 48399849 = 4470^2 + 6957^2 .

It is not a de Polignac number, because 68380749 - 2⁵ = 68380717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68380709) 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 11 ways as a sum of consecutive naturals, for example, 223314 + ... + 223619.

It is an arithmetic number, because the mean of its divisors is an integer number (8715213).

Almost surely, 2^68380749 is an apocalyptic number.

It is an amenable number.

68380749 is a deficient number, since it is larger than the sum of its proper divisors (36201807).

68380749 is a wasteful number, since it uses less digits than its factorization.

68380749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446956 (or 446953 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 68380749 is about 8269.2653240781. The cubic root of 68380749 is about 408.9258996601.

The spelling of 68380749 in words is "sixty-eight million, three hundred eighty thousand, seven hundred forty-nine".