213906911 has 2 divisors, whose sum is σ = 213906912. Its totient is φ = 213906910.

The previous prime is 213906893. The next prime is 213906943. The reversal of 213906911 is 119609312.

It is an a-pointer prime, because the next prime (213906943) can be obtained adding 213906911 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213906911 - 2¹⁴ = 213890527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213909911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106953455 + 106953456.

It is an arithmetic number, because the mean of its divisors is an integer number (106953456).

Almost surely, 2^213906911 is an apocalyptic number.

213906911 is a deficient number, since it is larger than the sum of its proper divisors (1).

213906911 is an equidigital number, since it uses as much as digits as its factorization.

213906911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 213906911 is about 14625.5567757265. The cubic root of 213906911 is about 598.0556606766.

The spelling of 213906911 in words is "two hundred thirteen million, nine hundred six thousand, nine hundred eleven".