494495251 has 2 divisors, whose sum is σ = 494495252. Its totient is φ = 494495250.

The previous prime is 494495249. The next prime is 494495297. The reversal of 494495251 is 152594494.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 494495251 - 2¹ = 494495249 is a prime.

Together with 494495249, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 494495198 and 494495207.

It is not a weakly prime, because it can be changed into another prime (494495231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247247625 + 247247626.

It is an arithmetic number, because the mean of its divisors is an integer number (247247626).

Almost surely, 2^494495251 is an apocalyptic number.

494495251 is a deficient number, since it is larger than the sum of its proper divisors (1).

494495251 is an equidigital number, since it uses as much as digits as its factorization.

494495251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 43.

The square root of 494495251 is about 22237.2491778997. The cubic root of 494495251 is about 790.7770227044. Note that the first 3 decimals are identical.

The spelling of 494495251 in words is "four hundred ninety-four million, four hundred ninety-five thousand, two hundred fifty-one".