213891827 has 2 divisors, whose sum is σ = 213891828. Its totient is φ = 213891826.

The previous prime is 213891817. The next prime is 213891871. The reversal of 213891827 is 728198312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213891827 - 2¹⁸ = 213629683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213891817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106945913 + 106945914.

It is an arithmetic number, because the mean of its divisors is an integer number (106945914).

Almost surely, 2^213891827 is an apocalyptic number.

213891827 is a deficient number, since it is larger than the sum of its proper divisors (1).

213891827 is an equidigital number, since it uses as much as digits as its factorization.

213891827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 213891827 is about 14625.0410939594. The cubic root of 213891827 is about 598.0416027178.

The spelling of 213891827 in words is "two hundred thirteen million, eight hundred ninety-one thousand, eight hundred twenty-seven".