68344987 has 4 divisors (see below), whose sum is σ = 70549696. Its totient is φ = 66140280.

The previous prime is 68344979. The next prime is 68344993. The reversal of 68344987 is 78944386.

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

It is a cyclic number.

It is not a de Polignac number, because 68344987 - 2³ = 68344979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68344987.

It is not an unprimeable number, because it can be changed into a prime (68344907) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1102308 + ... + 1102369.

It is an arithmetic number, because the mean of its divisors is an integer number (17637424).

Almost surely, 2^68344987 is an apocalyptic number.

68344987 is a deficient number, since it is larger than the sum of its proper divisors (2204709).

68344987 is a wasteful number, since it uses less digits than its factorization.

68344987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204708.

The product of its digits is 1161216, while the sum is 49.

The square root of 68344987 is about 8267.1026968340. The cubic root of 68344987 is about 408.8546000699.

The spelling of 68344987 in words is "sixty-eight million, three hundred forty-four thousand, nine hundred eighty-seven".