212064289 has 4 divisors (see below), whose sum is σ = 216065556. Its totient is φ = 208063024.

The previous prime is 212064283. The next prime is 212064311. The reversal of 212064289 is 982460212.

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 135326689 + 76737600 = 11633^2 + 8760^2 .

It is a cyclic number.

It is not a de Polignac number, because 212064289 - 2²⁵ = 178509857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212064283) 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, 2000554 + ... + 2000659.

It is an arithmetic number, because the mean of its divisors is an integer number (54016389).

Almost surely, 2^212064289 is an apocalyptic number.

It is an amenable number.

212064289 is a deficient number, since it is larger than the sum of its proper divisors (4001267).

212064289 is an equidigital number, since it uses as much as digits as its factorization.

212064289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001266.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 212064289 is about 14562.4273045396. The cubic root of 212064289 is about 596.3334629650. Note that the first 3 decimals are identical.

The spelling of 212064289 in words is "two hundred twelve million, sixty-four thousand, two hundred eighty-nine".