678021227 has 4 divisors (see below), whose sum is σ = 730176720. Its totient is φ = 625865736.

The previous prime is 678021221. The next prime is 678021233. The reversal of 678021227 is 722120876.

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

It is an interprime number because it is at equal distance from previous prime (678021221) and next prime (678021233).

It is a cyclic number.

It is not a de Polignac number, because 678021227 - 2⁸ = 678020971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678021221) 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, 26077727 + ... + 26077752.

It is an arithmetic number, because the mean of its divisors is an integer number (182544180).

Almost surely, 2^678021227 is an apocalyptic number.

678021227 is a deficient number, since it is larger than the sum of its proper divisors (52155493).

678021227 is a wasteful number, since it uses less digits than its factorization.

678021227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52155492.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 678021227 is about 26038.8407384046. The cubic root of 678021227 is about 878.5121324009.

The spelling of 678021227 in words is "six hundred seventy-eight million, twenty-one thousand, two hundred twenty-seven".