68103649 has 4 divisors (see below), whose sum is σ = 72109764. Its totient is φ = 64097536.

The previous prime is 68103613. The next prime is 68103661. The reversal of 68103649 is 94630186.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25070049 + 43033600 = 5007^2 + 6560^2 .

It is a cyclic number.

It is not a de Polignac number, because 68103649 - 2⁷ = 68103521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68103689) 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 3 ways as a sum of consecutive naturals, for example, 2003032 + ... + 2003065.

It is an arithmetic number, because the mean of its divisors is an integer number (18027441).

Almost surely, 2^68103649 is an apocalyptic number.

It is an amenable number.

68103649 is a deficient number, since it is larger than the sum of its proper divisors (4006115).

68103649 is a wasteful number, since it uses less digits than its factorization.

68103649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006114.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 68103649 is about 8252.4935019665. The cubic root of 68103649 is about 408.3727870065.

The spelling of 68103649 in words is "sixty-eight million, one hundred three thousand, six hundred forty-nine".