68320787 has 4 divisors (see below), whose sum is σ = 71291280. Its totient is φ = 65350296.

The previous prime is 68320783. The next prime is 68320831. The reversal of 68320787 is 78702386.

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 68320787 - 2² = 68320783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68320783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485212 + ... + 1485257.

It is an arithmetic number, because the mean of its divisors is an integer number (17822820).

Almost surely, 2^68320787 is an apocalyptic number.

68320787 is a deficient number, since it is larger than the sum of its proper divisors (2970493).

68320787 is a wasteful number, since it uses less digits than its factorization.

68320787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970492.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 68320787 is about 8265.6389347709. The cubic root of 68320787 is about 408.8063378160.

The spelling of 68320787 in words is "sixty-eight million, three hundred twenty thousand, seven hundred eighty-seven".