409669547 has 12 divisors (see below), whose sum is σ = 477291096. Its totient is φ = 350602560.

The previous prime is 409669543. The next prime is 409669549. The reversal of 409669547 is 745966904.

It is not a de Polignac number, because 409669547 - 2² = 409669543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 409669495 and 409669504.

It is not an unprimeable number, because it can be changed into a prime (409669541) 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, 27347 + ... + 39587.

It is an arithmetic number, because the mean of its divisors is an integer number (39774258).

Almost surely, 2^409669547 is an apocalyptic number.

409669547 is a deficient number, since it is larger than the sum of its proper divisors (67621549).

409669547 is a wasteful number, since it uses less digits than its factorization.

409669547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12938 (or 12931 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 409669547 is about 20240.2951312475. The cubic root of 409669547 is about 742.6962433663.

The spelling of 409669547 in words is "four hundred nine million, six hundred sixty-nine thousand, five hundred forty-seven".