47981187 has 8 divisors (see below), whose sum is σ = 71083280. Its totient is φ = 31987440.

The previous prime is 47981183. The next prime is 47981201. The reversal of 47981187 is 78118974.

It is not a de Polignac number, because 47981187 - 2² = 47981183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47981183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888514 + ... + 888567.

It is an arithmetic number, because the mean of its divisors is an integer number (8885410).

Almost surely, 2^47981187 is an apocalyptic number.

47981187 is a deficient number, since it is larger than the sum of its proper divisors (23102093).

47981187 is a wasteful number, since it uses less digits than its factorization.

47981187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777090 (or 1777084 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 47981187 is about 6926.8453858882. The cubic root of 47981187 is about 363.3766325152.

The spelling of 47981187 in words is "forty-seven million, nine hundred eighty-one thousand, one hundred eighty-seven".