213994069 has 4 divisors (see below), whose sum is σ = 214026444. Its totient is φ = 213961696.

The previous prime is 213994063. The next prime is 213994097. The reversal of 213994069 is 960499312.

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 4120900 + 209873169 = 2030^2 + 14487^2 .

It is a cyclic number.

It is not a de Polignac number, because 213994069 - 2⁹ = 213993557 is a prime.

It is a super-2 number, since 2×213994069² = 91586923134353522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213994063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (53506611).

Almost surely, 2^213994069 is an apocalyptic number.

It is an amenable number.

213994069 is a deficient number, since it is larger than the sum of its proper divisors (32375).

213994069 is an equidigital number, since it uses as much as digits as its factorization.

213994069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32374.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 213994069 is about 14628.5361195165. The cubic root of 213994069 is about 598.1368770915.

The spelling of 213994069 in words is "two hundred thirteen million, nine hundred ninety-four thousand, sixty-nine".