424192009 has 4 divisors (see below), whose sum is σ = 424233216. Its totient is φ = 424150804.

The previous prime is 424191991. The next prime is 424192037. The reversal of 424192009 is 900291424.

424192009 = T₁₆₈₁₅ + T₁₆₈₁₆ + T₁₆₈₁₇.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424192009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424192039) 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, 9492 + ... + 30634.

It is an arithmetic number, because the mean of its divisors is an integer number (106058304).

Almost surely, 2^424192009 is an apocalyptic number.

424192009 is the 16817-th centered triangular number.

It is an amenable number.

424192009 is a deficient number, since it is larger than the sum of its proper divisors (41207).

424192009 is a wasteful number, since it uses less digits than its factorization.

424192009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41206.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 424192009 is about 20595.9221449296. The cubic root of 424192009 is about 751.3705363516.

The spelling of 424192009 in words is "four hundred twenty-four million, one hundred ninety-two thousand, nine".