68739842 has 4 divisors (see below), whose sum is σ = 103109766. Its totient is φ = 34369920.

The previous prime is 68739817. The next prime is 68739859. The reversal of 68739842 is 24893786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24893786 = 2 ⋅12446893.

It can be written as a sum of positive squares in only one way, i.e., 62742241 + 5997601 = 7921^2 + 2449^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17184959 + ... + 17184962.

Almost surely, 2^68739842 is an apocalyptic number.

68739842 is a deficient number, since it is larger than the sum of its proper divisors (34369924).

68739842 is a wasteful number, since it uses less digits than its factorization.

68739842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34369923.

The product of its digits is 580608, while the sum is 47.

The square root of 68739842 is about 8290.9494028127. The cubic root of 68739842 is about 409.6404581478.

The spelling of 68739842 in words is "sixty-eight million, seven hundred thirty-nine thousand, eight hundred forty-two".