47987631 has 24 divisors (see below), whose sum is σ = 72558720. Its totient is φ = 30528576.

The previous prime is 47987629. The next prime is 47987633. The reversal of 47987631 is 13678974.

47987631 is a `hidden beast` number, since 4 + 7 + 9 + 8 + 7 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (47987629) and next prime (47987633).

It is not a de Polignac number, because 47987631 - 2¹ = 47987629 is a prime.

It is a super-2 number, since 2×47987631² = 4605625457984322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47987633) 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 23 ways as a sum of consecutive naturals, for example, 16290 + ... + 19008.

It is an arithmetic number, because the mean of its divisors is an integer number (3023280).

Almost surely, 2^47987631 is an apocalyptic number.

47987631 is a deficient number, since it is larger than the sum of its proper divisors (24571089).

47987631 is a wasteful number, since it uses less digits than its factorization.

47987631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2812 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 47987631 is about 6927.3105170766. The cubic root of 47987631 is about 363.3928992671.

The spelling of 47987631 in words is "forty-seven million, nine hundred eighty-seven thousand, six hundred thirty-one".