684450227 has 2 divisors, whose sum is σ = 684450228. Its totient is φ = 684450226.

The previous prime is 684450197. The next prime is 684450251. The reversal of 684450227 is 722054486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684450227 - 2²² = 680255923 is a prime.

It is a super-2 number, since 2×684450227² = 936944226480703058, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (684453227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342225113 + 342225114.

It is an arithmetic number, because the mean of its divisors is an integer number (342225114).

Almost surely, 2^684450227 is an apocalyptic number.

684450227 is a deficient number, since it is larger than the sum of its proper divisors (1).

684450227 is an equidigital number, since it uses as much as digits as its factorization.

684450227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 684450227 is about 26161.9996751013. Note that the first 3 decimals coincide. The cubic root of 684450227 is about 881.2800873519.

The spelling of 684450227 in words is "six hundred eighty-four million, four hundred fifty thousand, two hundred twenty-seven".