68956642 has 4 divisors (see below), whose sum is σ = 103434966. Its totient is φ = 34478320.

The previous prime is 68956637. The next prime is 68956687. The reversal of 68956642 is 24665986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24665986 = 2 ⋅12332993.

It can be written as a sum of positive squares in only one way, i.e., 41718681 + 27237961 = 6459^2 + 5219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68956592 and 68956601.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17239159 + ... + 17239162.

Almost surely, 2^68956642 is an apocalyptic number.

68956642 is a deficient number, since it is larger than the sum of its proper divisors (34478324).

68956642 is a wasteful number, since it uses less digits than its factorization.

68956642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34478323.

The product of its digits is 622080, while the sum is 46.

The square root of 68956642 is about 8304.0136078887. The cubic root of 68956642 is about 410.0706640051.

The spelling of 68956642 in words is "sixty-eight million, nine hundred fifty-six thousand, six hundred forty-two".