212074109 has 4 divisors (see below), whose sum is σ = 228387516. Its totient is φ = 195760704.

The previous prime is 212074103. The next prime is 212074117. The reversal of 212074109 is 901470212.

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 74011609 + 138062500 = 8603^2 + 11750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212074109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212074103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8156684 + ... + 8156709.

It is an arithmetic number, because the mean of its divisors is an integer number (57096879).

Almost surely, 2^212074109 is an apocalyptic number.

It is an amenable number.

212074109 is a deficient number, since it is larger than the sum of its proper divisors (16313407).

212074109 is a wasteful number, since it uses less digits than its factorization.

212074109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16313406.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 212074109 is about 14562.7644697015. The cubic root of 212074109 is about 596.3426675702.

The spelling of 212074109 in words is "two hundred twelve million, seventy-four thousand, one hundred nine".