47843779 has 4 divisors (see below), whose sum is σ = 48084400. Its totient is φ = 47603160.

The previous prime is 47843777. The next prime is 47843827. The reversal of 47843779 is 97734874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97734874 = 2 ⋅48867437.

It is a cyclic number.

It is not a de Polignac number, because 47843779 - 2¹ = 47843777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47843771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120012 + ... + 120409.

It is an arithmetic number, because the mean of its divisors is an integer number (12021100).

Almost surely, 2^47843779 is an apocalyptic number.

47843779 is a deficient number, since it is larger than the sum of its proper divisors (240621).

47843779 is a wasteful number, since it uses less digits than its factorization.

47843779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240620.

The product of its digits is 1185408, while the sum is 49.

The square root of 47843779 is about 6916.9197624376. The cubic root of 47843779 is about 363.0294228466.

The spelling of 47843779 in words is "forty-seven million, eight hundred forty-three thousand, seven hundred seventy-nine".