913621212 has 144 divisors (see below), whose sum is σ = 2752468992. Its totient is φ = 250024320.

The previous prime is 913621183. The next prime is 913621229. The reversal of 913621212 is 212126319.

913621212 is a `hidden beast` number, since 9 + 13 + 621 + 21 + 2 = 666.

913621212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 835338 + ... + 836430.

It is an arithmetic number, because the mean of its divisors is an integer number (19114368).

Almost surely, 2^913621212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 913621212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376234496).

913621212 is an abundant number, since it is smaller than the sum of its proper divisors (1838847780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

913621212 is a wasteful number, since it uses less digits than its factorization.

913621212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1243 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 913621212 is about 30226.1676697526. The cubic root of 913621212 is about 970.3358074932.

The spelling of 913621212 in words is "nine hundred thirteen million, six hundred twenty-one thousand, two hundred twelve".