213289969 has 4 divisors (see below), whose sum is σ = 213516144. Its totient is φ = 213063796.

The previous prime is 213289961. The next prime is 213289987. The reversal of 213289969 is 969982312.

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 a cyclic number.

It is not a de Polignac number, because 213289969 - 2³ = 213289961 is a prime.

It is a super-2 number, since 2×213289969² = 90985221752041922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213289961) 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, 111667 + ... + 113560.

It is an arithmetic number, because the mean of its divisors is an integer number (53379036).

Almost surely, 2^213289969 is an apocalyptic number.

It is an amenable number.

213289969 is a deficient number, since it is larger than the sum of its proper divisors (226175).

213289969 is an equidigital number, since it uses as much as digits as its factorization.

213289969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226174.

The product of its digits is 419904, while the sum is 49.

The square root of 213289969 is about 14604.4503148869. The cubic root of 213289969 is about 597.4801440622.

The spelling of 213289969 in words is "two hundred thirteen million, two hundred eighty-nine thousand, nine hundred sixty-nine".