47899813 has 4 divisors (see below), whose sum is σ = 51584428. Its totient is φ = 44215200.

The previous prime is 47899811. The next prime is 47899837. The reversal of 47899813 is 31899874.

It is a happy number.

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 26388769 + 21511044 = 5137^2 + 4638^2 .

It is a cyclic number.

It is not a de Polignac number, because 47899813 - 2¹ = 47899811 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 (47899811) 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, 1842288 + ... + 1842313.

It is an arithmetic number, because the mean of its divisors is an integer number (12896107).

Almost surely, 2^47899813 is an apocalyptic number.

It is an amenable number.

47899813 is a deficient number, since it is larger than the sum of its proper divisors (3684615).

47899813 is a wasteful number, since it uses less digits than its factorization.

47899813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684614.

The product of its digits is 435456, while the sum is 49.

The square root of 47899813 is about 6920.9690795437. The cubic root of 47899813 is about 363.1710926369.

The spelling of 47899813 in words is "forty-seven million, eight hundred ninety-nine thousand, eight hundred thirteen".