424831639 has 4 divisors (see below), whose sum is σ = 424973224. Its totient is φ = 424690056.

The previous prime is 424831613. The next prime is 424831651. The reversal of 424831639 is 936138424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 424831639 - 2¹³ = 424823447 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 (424831679) 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, 66192 + ... + 72325.

It is an arithmetic number, because the mean of its divisors is an integer number (106243306).

Almost surely, 2^424831639 is an apocalyptic number.

424831639 is a deficient number, since it is larger than the sum of its proper divisors (141585).

424831639 is a wasteful number, since it uses less digits than its factorization.

424831639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141584.

The product of its digits is 124416, while the sum is 40.

The square root of 424831639 is about 20611.4443695729. Note that the first 3 decimals coincide. The cubic root of 424831639 is about 751.7480051758.

The spelling of 424831639 in words is "four hundred twenty-four million, eight hundred thirty-one thousand, six hundred thirty-nine".