47199909 has 16 divisors (see below), whose sum is σ = 64648640. Its totient is φ = 30620160.

The previous prime is 47199899. The next prime is 47199917. The reversal of 47199909 is 90999174.

It is not a de Polignac number, because 47199909 - 2⁸ = 47199653 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47199989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16422 + ... + 19080.

It is an arithmetic number, because the mean of its divisors is an integer number (4040540).

Almost surely, 2^47199909 is an apocalyptic number.

It is an amenable number.

47199909 is a deficient number, since it is larger than the sum of its proper divisors (17448731).

47199909 is a wasteful number, since it uses less digits than its factorization.

47199909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 47199909 is about 6870.2189921428. The cubic root of 47199909 is about 361.3935416124.

The spelling of 47199909 in words is "forty-seven million, one hundred ninety-nine thousand, nine hundred nine".