47879999 has 4 divisors (see below), whose sum is σ = 48156936. Its totient is φ = 47603064.

The previous prime is 47879989. The next prime is 47880011. The reversal of 47879999 is 99997874.

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 47879999 - 2⁴ = 47879983 is a prime.

It is a Duffinian number.

47879999 is a modest number, since divided by 9999 gives 4787 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47879929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138209 + ... + 138554.

It is an arithmetic number, because the mean of its divisors is an integer number (12039234).

Almost surely, 2^47879999 is an apocalyptic number.

47879999 is a deficient number, since it is larger than the sum of its proper divisors (276937).

47879999 is a wasteful number, since it uses less digits than its factorization.

47879999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276936.

The product of its digits is 10287648, while the sum is 62.

The square root of 47879999 is about 6919.5374845433. The cubic root of 47879999 is about 363.1210098773.

The spelling of 47879999 in words is "forty-seven million, eight hundred seventy-nine thousand, nine hundred ninety-nine".