47427819 has 12 divisors (see below), whose sum is σ = 66742056. Its totient is φ = 29953728.

The previous prime is 47427797. The next prime is 47427889. The reversal of 47427819 is 91872474.

It is a happy number.

It is not a de Polignac number, because 47427819 - 2⁷ = 47427691 is a prime.

It is a super-2 number, since 2×47427819² = 4498796030193522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47427889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20814 + ... + 22979.

It is an arithmetic number, because the mean of its divisors is an integer number (5561838).

Almost surely, 2^47427819 is an apocalyptic number.

47427819 is a deficient number, since it is larger than the sum of its proper divisors (19314237).

47427819 is a wasteful number, since it uses less digits than its factorization.

47427819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43834 (or 43815 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 47427819 is about 6886.7858250420. The cubic root of 47427819 is about 361.9742841637.

It can be divided in two parts, 4742 and 7819, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 47427819 in words is "forty-seven million, four hundred twenty-seven thousand, eight hundred nineteen".