424020309 has 4 divisors (see below), whose sum is σ = 565360416. Its totient is φ = 282680204.

The previous prime is 424020301. The next prime is 424020313. The reversal of 424020309 is 903020424.

It is a happy number.

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 424020309 - 2³ = 424020301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424020301) 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, 70670049 + ... + 70670054.

It is an arithmetic number, because the mean of its divisors is an integer number (141340104).

Almost surely, 2^424020309 is an apocalyptic number.

It is an amenable number.

424020309 is a deficient number, since it is larger than the sum of its proper divisors (141340107).

424020309 is a wasteful number, since it uses less digits than its factorization.

424020309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141340106.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 424020309 is about 20591.7534221834. The cubic root of 424020309 is about 751.2691453709.

The spelling of 424020309 in words is "four hundred twenty-four million, twenty thousand, three hundred nine".