646410097 has 2 divisors, whose sum is σ = 646410098. Its totient is φ = 646410096.

The previous prime is 646410019. The next prime is 646410103. The reversal of 646410097 is 790014646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635493681 + 10916416 = 25209^2 + 3304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646410097 is a prime.

It is not a weakly prime, because it can be changed into another prime (646410007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323205048 + 323205049.

It is an arithmetic number, because the mean of its divisors is an integer number (323205049).

Almost surely, 2^646410097 is an apocalyptic number.

It is an amenable number.

646410097 is a deficient number, since it is larger than the sum of its proper divisors (1).

646410097 is an equidigital number, since it uses as much as digits as its factorization.

646410097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 646410097 is about 25424.5962996465. The cubic root of 646410097 is about 864.6414351343.

It can be divided in two parts, 6464 and 10097, that added together give a palindrome (16561).

The spelling of 646410097 in words is "six hundred forty-six million, four hundred ten thousand, ninety-seven".