68787442 has 4 divisors (see below), whose sum is σ = 103181166. Its totient is φ = 34393720.

The previous prime is 68787409. The next prime is 68787517. The reversal of 68787442 is 24478786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24478786 = 2 ⋅12239393.

It can be written as a sum of positive squares in only one way, i.e., 35390601 + 33396841 = 5949^2 + 5779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68787392 and 68787401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17196859 + ... + 17196862.

Almost surely, 2^68787442 is an apocalyptic number.

68787442 is a deficient number, since it is larger than the sum of its proper divisors (34393724).

68787442 is a wasteful number, since it uses less digits than its factorization.

68787442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34393723.

The product of its digits is 602112, while the sum is 46.

The square root of 68787442 is about 8293.8195061142. The cubic root of 68787442 is about 409.7349903541.

The spelling of 68787442 in words is "sixty-eight million, seven hundred eighty-seven thousand, four hundred forty-two".