68855587 has 4 divisors (see below), whose sum is σ = 69825456. Its totient is φ = 67885720.

The previous prime is 68855581. The next prime is 68855597. The reversal of 68855587 is 78555886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78555886 = 2 ⋅39277943.

It is a cyclic number.

It is not a de Polignac number, because 68855587 - 2⁷ = 68855459 is a prime.

It is a super-2 number, since 2×68855587² = 9482183722229138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68855581) 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, 484828 + ... + 484969.

It is an arithmetic number, because the mean of its divisors is an integer number (17456364).

Almost surely, 2^68855587 is an apocalyptic number.

68855587 is a deficient number, since it is larger than the sum of its proper divisors (969869).

68855587 is an equidigital number, since it uses as much as digits as its factorization.

68855587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969868.

The product of its digits is 2688000, while the sum is 52.

The square root of 68855587 is about 8297.9266687529. The cubic root of 68855587 is about 409.8702484524.

The spelling of 68855587 in words is "sixty-eight million, eight hundred fifty-five thousand, five hundred eighty-seven".