491310097 has 2 divisors, whose sum is σ = 491310098. Its totient is φ = 491310096.

The previous prime is 491310089. The next prime is 491310121. The reversal of 491310097 is 790013194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351337536 + 139972561 = 18744^2 + 11831^2 .

It is a cyclic number.

It is not a de Polignac number, because 491310097 - 2³ = 491310089 is a prime.

It is a super-2 number, since 2×491310097² = 482771222828298818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (491310007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245655048 + 245655049.

It is an arithmetic number, because the mean of its divisors is an integer number (245655049).

Almost surely, 2^491310097 is an apocalyptic number.

It is an amenable number.

491310097 is a deficient number, since it is larger than the sum of its proper divisors (1).

491310097 is an equidigital number, since it uses as much as digits as its factorization.

491310097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 491310097 is about 22165.5159425627. The cubic root of 491310097 is about 789.0755072276.

The spelling of 491310097 in words is "four hundred ninety-one million, three hundred ten thousand, ninety-seven".