494340921 has 8 divisors (see below), whose sum is σ = 732356960. Its totient is φ = 329560596.

The previous prime is 494340907. The next prime is 494340929. The reversal of 494340921 is 129043494.

It is not a de Polignac number, because 494340921 - 2¹⁵ = 494308153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494340929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9154435 + ... + 9154488.

It is an arithmetic number, because the mean of its divisors is an integer number (91544620).

Almost surely, 2^494340921 is an apocalyptic number.

It is an amenable number.

494340921 is a deficient number, since it is larger than the sum of its proper divisors (238016039).

494340921 is a wasteful number, since it uses less digits than its factorization.

494340921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18308932 (or 18308926 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 494340921 is about 22233.7788286202. The cubic root of 494340921 is about 790.6947480240.

The spelling of 494340921 in words is "four hundred ninety-four million, three hundred forty thousand, nine hundred twenty-one".