494949421 has 2 divisors, whose sum is σ = 494949422. Its totient is φ = 494949420.

The previous prime is 494949383. The next prime is 494949491. The reversal of 494949421 is 124949494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424154025 + 70795396 = 20595^2 + 8414^2 .

It is a cyclic number.

It is not a de Polignac number, because 494949421 - 2¹³ = 494941229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494949491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247474710 + 247474711.

It is an arithmetic number, because the mean of its divisors is an integer number (247474711).

Almost surely, 2^494949421 is an apocalyptic number.

It is an amenable number.

494949421 is a deficient number, since it is larger than the sum of its proper divisors (1).

494949421 is an equidigital number, since it uses as much as digits as its factorization.

494949421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 494949421 is about 22247.4587537543. The cubic root of 494949421 is about 791.0190454557.

The spelling of 494949421 in words is "four hundred ninety-four million, nine hundred forty-nine thousand, four hundred twenty-one".