213704289 has 24 divisors (see below), whose sum is σ = 317057832. Its totient is φ = 138654720.

The previous prime is 213704287. The next prime is 213704303. The reversal of 213704289 is 982407312.

213704289 is a `hidden beast` number, since 2 + 1 + 370 + 4 + 289 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13198689 + 200505600 = 3633^2 + 14160^2 .

It is not a de Polignac number, because 213704289 - 2¹ = 213704287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213704287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51247 + ... + 55259.

It is an arithmetic number, because the mean of its divisors is an integer number (13210743).

Almost surely, 2^213704289 is an apocalyptic number.

It is an amenable number.

213704289 is a deficient number, since it is larger than the sum of its proper divisors (103353543).

213704289 is a wasteful number, since it uses less digits than its factorization.

213704289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177 (or 4174 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 213704289 is about 14618.6281504114. The cubic root of 213704289 is about 597.8667661777.

The spelling of 213704289 in words is "two hundred thirteen million, seven hundred four thousand, two hundred eighty-nine".