494540831 has 2 divisors, whose sum is σ = 494540832. Its totient is φ = 494540830.

The previous prime is 494540821. The next prime is 494540833. The reversal of 494540831 is 138045494.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494540831 - 2¹⁴ = 494524447 is a prime.

It is a super-2 number, since 2×494540831² = 489141267052341122, which contains 22 as substring.

Together with 494540833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494540833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247270415 + 247270416.

It is an arithmetic number, because the mean of its divisors is an integer number (247270416).

Almost surely, 2^494540831 is an apocalyptic number.

494540831 is a deficient number, since it is larger than the sum of its proper divisors (1).

494540831 is an equidigital number, since it uses as much as digits as its factorization.

494540831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 494540831 is about 22238.2740112627. The cubic root of 494540831 is about 790.8013185288.

The spelling of 494540831 in words is "four hundred ninety-four million, five hundred forty thousand, eight hundred thirty-one".