47779243 has 4 divisors (see below), whose sum is σ = 50293960. Its totient is φ = 45264528.

The previous prime is 47779229. The next prime is 47779253. The reversal of 47779243 is 34297774.

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

It is a cyclic number.

It is not a de Polignac number, because 47779243 - 2¹³ = 47771051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47779243.

It is not an unprimeable number, because it can be changed into a prime (47779253) 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, 1257330 + ... + 1257367.

It is an arithmetic number, because the mean of its divisors is an integer number (12573490).

Almost surely, 2^47779243 is an apocalyptic number.

47779243 is a deficient number, since it is larger than the sum of its proper divisors (2514717).

47779243 is a wasteful number, since it uses less digits than its factorization.

47779243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514716.

The product of its digits is 296352, while the sum is 43.

The square root of 47779243 is about 6912.2531058982. The cubic root of 47779243 is about 362.8661204670.

The spelling of 47779243 in words is "forty-seven million, seven hundred seventy-nine thousand, two hundred forty-three".