947211900 has 36 divisors (see below), whose sum is σ = 2740600632. Its totient is φ = 252589760.

The previous prime is 947211857. The next prime is 947211907. The reversal of 947211900 is 9112749.

947211900 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×947211900² = 1794420767003220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947211907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1578387 + ... + 1578986.

Almost surely, 2^947211900 is an apocalyptic number.

It is an amenable number.

947211900 is an abundant number, since it is smaller than the sum of its proper divisors (1793388732).

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

947211900 is a wasteful number, since it uses less digits than its factorization.

947211900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157390 (or 3157383 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 947211900 is about 30776.8078266736. The cubic root of 947211900 is about 982.0849336764.

The spelling of 947211900 in words is "nine hundred forty-seven million, two hundred eleven thousand, nine hundred".