47999813 has 4 divisors (see below), whose sum is σ = 48578208. Its totient is φ = 47421420.

The previous prime is 47999803. The next prime is 47999839. The reversal of 47999813 is 31899974.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47999813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47999803) 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, 289073 + ... + 289238.

It is an arithmetic number, because the mean of its divisors is an integer number (12144552).

Almost surely, 2^47999813 is an apocalyptic number.

It is an amenable number.

47999813 is a deficient number, since it is larger than the sum of its proper divisors (578395).

47999813 is an equidigital number, since it uses as much as digits as its factorization.

47999813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578394.

The product of its digits is 489888, while the sum is 50.

The square root of 47999813 is about 6928.1897346998. The cubic root of 47999813 is about 363.4236466192.

The spelling of 47999813 in words is "forty-seven million, nine hundred ninety-nine thousand, eight hundred thirteen".