68441987 has 4 divisors (see below), whose sum is σ = 68472096. Its totient is φ = 68411880.

The previous prime is 68441969. The next prime is 68441993. The reversal of 68441987 is 78914486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68441987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68441687) 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 in 3 ways as a sum of consecutive naturals, for example, 11339 + ... + 16292.

It is an arithmetic number, because the mean of its divisors is an integer number (17118024).

Almost surely, 2^68441987 is an apocalyptic number.

68441987 is a deficient number, since it is larger than the sum of its proper divisors (30109).

68441987 is a wasteful number, since it uses less digits than its factorization.

68441987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30108.

The product of its digits is 387072, while the sum is 47.

The square root of 68441987 is about 8272.9672427733. The cubic root of 68441987 is about 409.0479336778.

The spelling of 68441987 in words is "sixty-eight million, four hundred forty-one thousand, nine hundred eighty-seven".