47687591 has 4 divisors (see below), whose sum is σ = 54500112. Its totient is φ = 40875072.

The previous prime is 47687557. The next prime is 47687597. The reversal of 47687591 is 19578674.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 47687591 - 2²² = 43493287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47687597) 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 3 ways as a sum of consecutive naturals, for example, 3406250 + ... + 3406263.

It is an arithmetic number, because the mean of its divisors is an integer number (13625028).

Almost surely, 2^47687591 is an apocalyptic number.

47687591 is a deficient number, since it is larger than the sum of its proper divisors (6812521).

47687591 is an equidigital number, since it uses as much as digits as its factorization.

47687591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812520.

The product of its digits is 423360, while the sum is 47.

The square root of 47687591 is about 6905.6202473058. The cubic root of 47687591 is about 362.6339506551.

The spelling of 47687591 in words is "forty-seven million, six hundred eighty-seven thousand, five hundred ninety-one".