68684761 has 4 divisors (see below), whose sum is σ = 69652224. Its totient is φ = 67717300.

The previous prime is 68684729. The next prime is 68684797. The reversal of 68684761 is 16748686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16748686 = 2 ⋅8374343.

It is a cyclic number.

It is not a de Polignac number, because 68684761 - 2⁵ = 68684729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68684701) 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, 483625 + ... + 483766.

It is an arithmetic number, because the mean of its divisors is an integer number (17413056).

Almost surely, 2^68684761 is an apocalyptic number.

It is an amenable number.

68684761 is a deficient number, since it is larger than the sum of its proper divisors (967463).

68684761 is an equidigital number, since it uses as much as digits as its factorization.

68684761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967462.

The product of its digits is 387072, while the sum is 46.

The square root of 68684761 is about 8287.6269824359. The cubic root of 68684761 is about 409.5310144116.

The spelling of 68684761 in words is "sixty-eight million, six hundred eighty-four thousand, seven hundred sixty-one".