417947561 has 4 divisors (see below), whose sum is σ = 420048000. Its totient is φ = 415847124.

The previous prime is 417947521. The next prime is 417947581. The reversal of 417947561 is 165749714.

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 a cyclic number.

It is not a de Polignac number, because 417947561 - 2¹⁰ = 417946537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (417947501) 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, 1049921 + ... + 1050318.

It is an arithmetic number, because the mean of its divisors is an integer number (105012000).

Almost surely, 2^417947561 is an apocalyptic number.

It is an amenable number.

417947561 is a deficient number, since it is larger than the sum of its proper divisors (2100439).

417947561 is a wasteful number, since it uses less digits than its factorization.

417947561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100438.

The product of its digits is 211680, while the sum is 44.

The square root of 417947561 is about 20443.7658223724. The cubic root of 417947561 is about 747.6653689452.

The spelling of 417947561 in words is "four hundred seventeen million, nine hundred forty-seven thousand, five hundred sixty-one".