494951993 has 2 divisors, whose sum is σ = 494951994. Its totient is φ = 494951992.

The previous prime is 494951917. The next prime is 494951999. The reversal of 494951993 is 399159494.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366990649 + 127961344 = 19157^2 + 11312^2 .

It is a cyclic number.

It is not a de Polignac number, because 494951993 - 2¹² = 494947897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (494951999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247475996 + 247475997.

It is an arithmetic number, because the mean of its divisors is an integer number (247475997).

Almost surely, 2^494951993 is an apocalyptic number.

It is an amenable number.

494951993 is a deficient number, since it is larger than the sum of its proper divisors (1).

494951993 is an equidigital number, since it uses as much as digits as its factorization.

494951993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 494951993 is about 22247.5165580341. The cubic root of 494951993 is about 791.0204156276.

The spelling of 494951993 in words is "four hundred ninety-four million, nine hundred fifty-one thousand, nine hundred ninety-three".