427935509 has 4 divisors (see below), whose sum is σ = 453108204. Its totient is φ = 402762816.

The previous prime is 427935503. The next prime is 427935511. The reversal of 427935509 is 905539724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 375778225 + 52157284 = 19385^2 + 7222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427935509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427935509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427935503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12586322 + ... + 12586355.

It is an arithmetic number, because the mean of its divisors is an integer number (113277051).

Almost surely, 2^427935509 is an apocalyptic number.

It is an amenable number.

427935509 is a deficient number, since it is larger than the sum of its proper divisors (25172695).

427935509 is a wasteful number, since it uses less digits than its factorization.

427935509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25172694.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 427935509 is about 20686.6021617858. The cubic root of 427935509 is about 753.5743510324.

The spelling of 427935509 in words is "four hundred twenty-seven million, nine hundred thirty-five thousand, five hundred nine".