68786387 has 4 divisors (see below), whose sum is σ = 69454320. Its totient is φ = 68118456.

The previous prime is 68786381. The next prime is 68786411. The reversal of 68786387 is 78368786.

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 68786387 - 2⁴ = 68786371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68786381) 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, 333812 + ... + 334017.

It is an arithmetic number, because the mean of its divisors is an integer number (17363580).

Almost surely, 2^68786387 is an apocalyptic number.

68786387 is a deficient number, since it is larger than the sum of its proper divisors (667933).

68786387 is a wasteful number, since it uses less digits than its factorization.

68786387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667932.

The product of its digits is 2709504, while the sum is 53.

The square root of 68786387 is about 8293.7559042933. The cubic root of 68786387 is about 409.7328956276.

The spelling of 68786387 in words is "sixty-eight million, seven hundred eighty-six thousand, three hundred eighty-seven".