68685387 has 4 divisors (see below), whose sum is σ = 91580520. Its totient is φ = 45790256.

The previous prime is 68685359. The next prime is 68685391. The reversal of 68685387 is 78358686.

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 68685387 - 2⁷ = 68685259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68685347) 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, 11447562 + ... + 11447567.

It is an arithmetic number, because the mean of its divisors is an integer number (22895130).

Almost surely, 2^68685387 is an apocalyptic number.

68685387 is a deficient number, since it is larger than the sum of its proper divisors (22895133).

68685387 is a wasteful number, since it uses less digits than its factorization.

68685387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22895132.

The product of its digits is 1935360, while the sum is 51.

The square root of 68685387 is about 8287.6647494937. The cubic root of 68685387 is about 409.5322585771.

The spelling of 68685387 in words is "sixty-eight million, six hundred eighty-five thousand, three hundred eighty-seven".