47864389 has 4 divisors (see below), whose sum is σ = 47921356. Its totient is φ = 47807424.

The previous prime is 47864381. The next prime is 47864419. The reversal of 47864389 is 98346874.

47864389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98346874 = 2 ⋅49173437.

It can be written as a sum of positive squares in 2 ways, for example, as 736164 + 47128225 = 858^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 47864389 - 2³ = 47864381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47864381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27204 + ... + 28909.

It is an arithmetic number, because the mean of its divisors is an integer number (11980339).

Almost surely, 2^47864389 is an apocalyptic number.

It is an amenable number.

47864389 is a deficient number, since it is larger than the sum of its proper divisors (56967).

47864389 is an equidigital number, since it uses as much as digits as its factorization.

47864389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56966.

The product of its digits is 1161216, while the sum is 49.

The square root of 47864389 is about 6918.4094270287. The cubic root of 47864389 is about 363.0815436061.

The spelling of 47864389 in words is "forty-seven million, eight hundred sixty-four thousand, three hundred eighty-nine".