213069 has 4 divisors (see below), whose sum is σ = 284096. Its totient is φ = 142044.

The previous prime is 213067. The next prime is 213079. The reversal of 213069 is 960312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213069 - 2¹ = 213067 is a prime.

It is a super-2 number, since 2×213069² = 90796797522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

213069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35509 + ... + 35514.

It is an arithmetic number, because the mean of its divisors is an integer number (71024).

2²¹³⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

213069 is a deficient number, since it is larger than the sum of its proper divisors (71027).

213069 is an equidigital number, since it uses as much as digits as its factorization.

213069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71026.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 213069 is about 461.5939774304. The cubic root of 213069 is about 59.7273742406.

The spelling of 213069 in words is "two hundred thirteen thousand, sixty-nine".