213779346 has 16 divisors (see below), whose sum is σ = 466427808. Its totient is φ = 64781600.

The previous prime is 213779333. The next prime is 213779351. The reversal of 213779346 is 643977312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213779298 and 213779307.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1619475 + ... + 1619606.

It is an arithmetic number, because the mean of its divisors is an integer number (29151738).

Almost surely, 2^213779346 is an apocalyptic number.

213779346 is an abundant number, since it is smaller than the sum of its proper divisors (252648462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213779346 is a wasteful number, since it uses less digits than its factorization.

213779346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239097.

The product of its digits is 190512, while the sum is 42.

The square root of 213779346 is about 14621.1950947930. The cubic root of 213779346 is about 597.9367520346.

The spelling of 213779346 in words is "two hundred thirteen million, seven hundred seventy-nine thousand, three hundred forty-six".