427197909 has 8 divisors (see below), whose sum is σ = 571150720. Its totient is φ = 284021856.

The previous prime is 427197871. The next prime is 427197931. The reversal of 427197909 is 909791724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427197909 - 2¹¹ = 427195861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427197989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192904 + ... + 195105.

It is an arithmetic number, because the mean of its divisors is an integer number (71393840).

Almost surely, 2^427197909 is an apocalyptic number.

It is an amenable number.

427197909 is a deficient number, since it is larger than the sum of its proper divisors (143952811).

427197909 is a wasteful number, since it uses less digits than its factorization.

427197909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388379.

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 427197909 is about 20668.7665089139. The cubic root of 427197909 is about 753.1411423777.

The spelling of 427197909 in words is "four hundred twenty-seven million, one hundred ninety-seven thousand, nine hundred nine".