47996409 has 4 divisors (see below), whose sum is σ = 63995216. Its totient is φ = 31997604.

The previous prime is 47996393. The next prime is 47996419. The reversal of 47996409 is 90469974.

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 47996409 - 2⁴ = 47996393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47996419) 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, 7999399 + ... + 7999404.

It is an arithmetic number, because the mean of its divisors is an integer number (15998804).

Almost surely, 2^47996409 is an apocalyptic number.

It is an amenable number.

47996409 is a deficient number, since it is larger than the sum of its proper divisors (15998807).

47996409 is a wasteful number, since it uses less digits than its factorization.

47996409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15998806.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 47996409 is about 6927.9440673262. The cubic root of 47996409 is about 363.4150554515.

The spelling of 47996409 in words is "forty-seven million, nine hundred ninety-six thousand, four hundred nine".