68643742 has 8 divisors (see below), whose sum is σ = 104122800. Its totient is φ = 33936144.

The previous prime is 68643737. The next prime is 68643779. The reversal of 68643742 is 24734686.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 68643695 and 68643704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192642 + ... + 192997.

It is an arithmetic number, because the mean of its divisors is an integer number (13015350).

Almost surely, 2^68643742 is an apocalyptic number.

68643742 is a deficient number, since it is larger than the sum of its proper divisors (35479058).

68643742 is a wasteful number, since it uses less digits than its factorization.

68643742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385730.

The product of its digits is 193536, while the sum is 40.

The square root of 68643742 is about 8285.1518996335. The cubic root of 68643742 is about 409.4494732875.

The spelling of 68643742 in words is "sixty-eight million, six hundred forty-three thousand, seven hundred forty-two".