212949669 has 8 divisors (see below), whose sum is σ = 284000320. Its totient is φ = 141932736.

The previous prime is 212949647. The next prime is 212949691. The reversal of 212949669 is 966949212.

212949669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212949647) and next prime (212949691).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212949669 - 2⁸ = 212949413 is a prime.

It is a super-2 number, since 2×212949669² = 90695123054419122, 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 (212949469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20304 + ... + 28950.

It is an arithmetic number, because the mean of its divisors is an integer number (35500040).

Almost surely, 2^212949669 is an apocalyptic number.

It is an amenable number.

212949669 is a deficient number, since it is larger than the sum of its proper divisors (71050651).

212949669 is an equidigital number, since it uses as much as digits as its factorization.

212949669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16859.

The product of its digits is 419904, while the sum is 48.

The square root of 212949669 is about 14592.7951058048. The cubic root of 212949669 is about 597.1622189354.

The spelling of 212949669 in words is "two hundred twelve million, nine hundred forty-nine thousand, six hundred sixty-nine".