68787242 has 4 divisors (see below), whose sum is σ = 103180866. Its totient is φ = 34393620.

The previous prime is 68787241. The next prime is 68787263. The reversal of 68787242 is 24278786.

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., 68376361 + 410881 = 8269^2 + 641^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68787193 and 68787202.

It is not an unprimeable number, because it can be changed into a prime (68787241) 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 as a sum of consecutive naturals, namely, 17196809 + ... + 17196812.

Almost surely, 2^68787242 is an apocalyptic number.

68787242 is a deficient number, since it is larger than the sum of its proper divisors (34393624).

68787242 is a wasteful number, since it uses less digits than its factorization.

68787242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34393623.

The product of its digits is 301056, while the sum is 44.

The square root of 68787242 is about 8293.8074489344. The cubic root of 68787242 is about 409.7345932512.

The spelling of 68787242 in words is "sixty-eight million, seven hundred eighty-seven thousand, two hundred forty-two".