47681491 has 16 divisors (see below), whose sum is σ = 56377440. Its totient is φ = 39992160.

The previous prime is 47681489. The next prime is 47681497. The reversal of 47681491 is 19418674.

It is not a de Polignac number, because 47681491 - 2¹ = 47681489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47681497) 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 15 ways as a sum of consecutive naturals, for example, 23181 + ... + 25153.

It is an arithmetic number, because the mean of its divisors is an integer number (3523590).

Almost surely, 2^47681491 is an apocalyptic number.

47681491 is a deficient number, since it is larger than the sum of its proper divisors (8695949).

47681491 is a wasteful number, since it uses less digits than its factorization.

47681491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023 (or 1997 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 47681491 is about 6905.1785639475. The cubic root of 47681491 is about 362.6184877826.

The spelling of 47681491 in words is "forty-seven million, six hundred eighty-one thousand, four hundred ninety-one".