47121912 has 40 divisors (see below), whose sum is σ = 131986800. Its totient is φ = 15707088.

The previous prime is 47121901. The next prime is 47121931. The reversal of 47121912 is 21912174.

47121912 is a `hidden beast` number, since 471 + 2 + 191 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35712 + ... + 37007.

It is an arithmetic number, because the mean of its divisors is an integer number (3299670).

Almost surely, 2^47121912 is an apocalyptic number.

It is an amenable number.

47121912 is an abundant number, since it is smaller than the sum of its proper divisors (84864888).

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

47121912 is a wasteful number, since it uses less digits than its factorization.

47121912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72737 (or 72724 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 47121912 is about 6864.5401885341. The cubic root of 47121912 is about 361.1943664202.

The spelling of 47121912 in words is "forty-seven million, one hundred twenty-one thousand, nine hundred twelve".