213779113 has 4 divisors (see below), whose sum is σ = 216707668. Its totient is φ = 210850560.

The previous prime is 213779107. The next prime is 213779129. The reversal of 213779113 is 311977312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60093504 + 153685609 = 7752^2 + 12397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213779113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213770113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464168 + ... + 1464313.

It is an arithmetic number, because the mean of its divisors is an integer number (54176917).

Almost surely, 2^213779113 is an apocalyptic number.

It is an amenable number.

213779113 is a deficient number, since it is larger than the sum of its proper divisors (2928555).

213779113 is an equidigital number, since it uses as much as digits as its factorization.

213779113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928554.

The product of its digits is 7938, while the sum is 34.

The square root of 213779113 is about 14621.1871269059. The cubic root of 213779113 is about 597.9365348023.

The spelling of 213779113 in words is "two hundred thirteen million, seven hundred seventy-nine thousand, one hundred thirteen".