68431747 has 8 divisors (see below), whose sum is σ = 70553952. Its totient is φ = 66331200.

The previous prime is 68431697. The next prime is 68431771. The reversal of 68431747 is 74713486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68431747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68431147) 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 7 ways as a sum of consecutive naturals, for example, 1122 + ... + 11752.

It is an arithmetic number, because the mean of its divisors is an integer number (8819244).

Almost surely, 2^68431747 is an apocalyptic number.

68431747 is a deficient number, since it is larger than the sum of its proper divisors (2122205).

68431747 is a wasteful number, since it uses less digits than its factorization.

68431747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829.

The product of its digits is 112896, while the sum is 40.

The square root of 68431747 is about 8272.3483364762. The cubic root of 68431747 is about 409.0275326543.

The spelling of 68431747 in words is "sixty-eight million, four hundred thirty-one thousand, seven hundred forty-seven".