8409947 has 12 divisors (see below), whose sum is σ = 10409040. Its totient is φ = 6653088.

The previous prime is 8409941. The next prime is 8410001. The reversal of 8409947 is 7499048.

It is not a de Polignac number, because 8409947 - 2⁴ = 8409931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8409941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2372 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (867420).

Almost surely, 2^8409947 is an apocalyptic number.

8409947 is a deficient number, since it is larger than the sum of its proper divisors (1999093).

8409947 is a wasteful number, since it uses less digits than its factorization.

8409947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142 (or 7129 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 8409947 is about 2899.9908620546. The cubic root of 8409947 is about 203.3594785575.

The spelling of 8409947 in words is "eight million, four hundred nine thousand, nine hundred forty-seven".