494421817 has 2 divisors, whose sum is σ = 494421818. Its totient is φ = 494421816.

The previous prime is 494421791. The next prime is 494421847. The reversal of 494421817 is 718124494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272382016 + 222039801 = 16504^2 + 14901^2 .

It is a cyclic number.

It is not a de Polignac number, because 494421817 - 2⁷ = 494421689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 494421817.

It is not a weakly prime, because it can be changed into another prime (494421847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247210908 + 247210909.

It is an arithmetic number, because the mean of its divisors is an integer number (247210909).

Almost surely, 2^494421817 is an apocalyptic number.

It is an amenable number.

494421817 is a deficient number, since it is larger than the sum of its proper divisors (1).

494421817 is an equidigital number, since it uses as much as digits as its factorization.

494421817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 494421817 is about 22235.5979681231. The cubic root of 494421817 is about 790.7378765283.

The spelling of 494421817 in words is "four hundred ninety-four million, four hundred twenty-one thousand, eight hundred seventeen".