47990409 has 16 divisors (see below), whose sum is σ = 67879680. Its totient is φ = 30073680.

The previous prime is 47990401. The next prime is 47990417. The reversal of 47990409 is 90409974.

It is an interprime number because it is at equal distance from previous prime (47990401) and next prime (47990417).

It is not a de Polignac number, because 47990409 - 2³ = 47990401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47990401) 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, 4254 + ... + 10680.

It is an arithmetic number, because the mean of its divisors is an integer number (4242480).

Almost surely, 2^47990409 is an apocalyptic number.

It is an amenable number.

47990409 is a deficient number, since it is larger than the sum of its proper divisors (19889271).

47990409 is a wasteful number, since it uses less digits than its factorization.

47990409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6580.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 47990409 is about 6927.5110248920. The cubic root of 47990409 is about 363.3999113935.

The spelling of 47990409 in words is "forty-seven million, nine hundred ninety thousand, four hundred nine".