494506409 has 4 divisors (see below), whose sum is σ = 501471360. Its totient is φ = 487541460.

The previous prime is 494506393. The next prime is 494506423. The reversal of 494506409 is 904605494.

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 494506409 - 2⁴ = 494506393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494506469) 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, 3482369 + ... + 3482510.

It is an arithmetic number, because the mean of its divisors is an integer number (125367840).

Almost surely, 2^494506409 is an apocalyptic number.

It is an amenable number.

494506409 is a deficient number, since it is larger than the sum of its proper divisors (6964951).

494506409 is an equidigital number, since it uses as much as digits as its factorization.

494506409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964950.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 494506409 is about 22237.5000618325. The cubic root of 494506409 is about 790.7829704688.

The spelling of 494506409 in words is "four hundred ninety-four million, five hundred six thousand, four hundred nine".