68707613 has 4 divisors (see below), whose sum is σ = 73992828. Its totient is φ = 63422400.

The previous prime is 68707609. The next prime is 68707619. The reversal of 68707613 is 31670786.

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 12802084 + 55905529 = 3578^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 68707613 - 2² = 68707609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68707619) 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 3 ways as a sum of consecutive naturals, for example, 2642588 + ... + 2642613.

It is an arithmetic number, because the mean of its divisors is an integer number (18498207).

Almost surely, 2^68707613 is an apocalyptic number.

It is an amenable number.

68707613 is a deficient number, since it is larger than the sum of its proper divisors (5285215).

68707613 is a wasteful number, since it uses less digits than its factorization.

68707613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285214.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 68707613 is about 8289.0055495216. The cubic root of 68707613 is about 409.5764275178.

The spelling of 68707613 in words is "sixty-eight million, seven hundred seven thousand, six hundred thirteen".