424626209 has 12 divisors (see below), whose sum is σ = 499508100. Its totient is φ = 359872128.

The previous prime is 424626197. The next prime is 424626229. The reversal of 424626209 is 902626424.

It can be written as a sum of positive squares in 2 ways, for example, as 299186209 + 125440000 = 17297^2 + 11200^2 .

It is not a de Polignac number, because 424626209 - 2²⁸ = 156190753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (424626229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44324 + ... + 53045.

It is an arithmetic number, because the mean of its divisors is an integer number (41625675).

Almost surely, 2^424626209 is an apocalyptic number.

424626209 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

424626209 is a deficient number, since it is larger than the sum of its proper divisors (74881891).

424626209 is an equidigital number, since it uses as much as digits as its factorization.

424626209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97472 (or 97465 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 424626209 is about 20606.4603704761. The cubic root of 424626209 is about 751.6268148208.

The spelling of 424626209 in words is "four hundred twenty-four million, six hundred twenty-six thousand, two hundred nine".