47840393 has 4 divisors (see below), whose sum is σ = 48013380. Its totient is φ = 47667408.

The previous prime is 47840389. The next prime is 47840411. The reversal of 47840393 is 39304874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31494544 + 16345849 = 5612^2 + 4043^2 .

It is a cyclic number.

It is not a de Polignac number, because 47840393 - 2² = 47840389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47840693) 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, 86078 + ... + 86631.

It is an arithmetic number, because the mean of its divisors is an integer number (12003345).

Almost surely, 2^47840393 is an apocalyptic number.

It is an amenable number.

47840393 is a deficient number, since it is larger than the sum of its proper divisors (172987).

47840393 is a wasteful number, since it uses less digits than its factorization.

47840393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172986.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 47840393 is about 6916.6749959789. The cubic root of 47840393 is about 363.0208585383.

The spelling of 47840393 in words is "forty-seven million, eight hundred forty thousand, three hundred ninety-three".