68687042 has 4 divisors (see below), whose sum is σ = 103030566. Its totient is φ = 34343520.

The previous prime is 68687027. The next prime is 68687081. The reversal of 68687042 is 24078686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55517401 + 13169641 = 7451^2 + 3629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17171759 + ... + 17171762.

Almost surely, 2^68687042 is an apocalyptic number.

68687042 is a deficient number, since it is larger than the sum of its proper divisors (34343524).

68687042 is a wasteful number, since it uses less digits than its factorization.

68687042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34343523.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 68687042 is about 8287.7645960778. The cubic root of 68687042 is about 409.5355478281.

The spelling of 68687042 in words is "sixty-eight million, six hundred eighty-seven thousand, forty-two".