47973909 has 4 divisors (see below), whose sum is σ = 63965216. Its totient is φ = 31982604.

The previous prime is 47973901. The next prime is 47973971. The reversal of 47973909 is 90937974.

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 not a de Polignac number, because 47973909 - 2³ = 47973901 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 (47973901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7995649 + ... + 7995654.

It is an arithmetic number, because the mean of its divisors is an integer number (15991304).

Almost surely, 2^47973909 is an apocalyptic number.

It is an amenable number.

47973909 is a deficient number, since it is larger than the sum of its proper divisors (15991307).

47973909 is a wasteful number, since it uses less digits than its factorization.

47973909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15991306.

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 47973909 is about 6926.3200185957. The cubic root of 47973909 is about 363.3582587245.

The spelling of 47973909 in words is "forty-seven million, nine hundred seventy-three thousand, nine hundred nine".