427543617 has 4 divisors (see below), whose sum is σ = 570058160. Its totient is φ = 285029076.

The previous prime is 427543601. The next prime is 427543663. The reversal of 427543617 is 716345724.

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 427543617 - 2⁴ = 427543601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427543517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71257267 + ... + 71257272.

It is an arithmetic number, because the mean of its divisors is an integer number (142514540).

Almost surely, 2^427543617 is an apocalyptic number.

It is an amenable number.

427543617 is a deficient number, since it is larger than the sum of its proper divisors (142514543).

427543617 is a wasteful number, since it uses less digits than its factorization.

427543617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142514542.

The product of its digits is 141120, while the sum is 39.

The square root of 427543617 is about 20677.1278711527. The cubic root of 427543617 is about 753.3442463025.

The spelling of 427543617 in words is "four hundred twenty-seven million, five hundred forty-three thousand, six hundred seventeen".