493897081 has 2 divisors, whose sum is σ = 493897082. Its totient is φ = 493897080.

The previous prime is 493897069. The next prime is 493897091. The reversal of 493897081 is 180798394.

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., 460488681 + 33408400 = 21459^2 + 5780^2 .

It is a cyclic number.

It is not a de Polignac number, because 493897081 - 2⁹ = 493896569 is a prime.

It is a super-2 number, since 2×493897081² = 487868653240641122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (493897021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246948540 + 246948541.

It is an arithmetic number, because the mean of its divisors is an integer number (246948541).

Almost surely, 2^493897081 is an apocalyptic number.

It is an amenable number.

493897081 is a deficient number, since it is larger than the sum of its proper divisors (1).

493897081 is an equidigital number, since it uses as much as digits as its factorization.

493897081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 493897081 is about 22223.7953779277. The cubic root of 493897081 is about 790.4580375376.

The spelling of 493897081 in words is "four hundred ninety-three million, eight hundred ninety-seven thousand, eighty-one".