646460053 has 2 divisors, whose sum is σ = 646460054. Its totient is φ = 646460052.

The previous prime is 646460051. The next prime is 646460069. The reversal of 646460053 is 350064646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483208324 + 163251729 = 21982^2 + 12777^2 .

It is a cyclic number.

It is not a de Polignac number, because 646460053 - 2¹ = 646460051 is a prime.

Together with 646460051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646460051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323230026 + 323230027.

It is an arithmetic number, because the mean of its divisors is an integer number (323230027).

Almost surely, 2^646460053 is an apocalyptic number.

It is an amenable number.

646460053 is a deficient number, since it is larger than the sum of its proper divisors (1).

646460053 is an equidigital number, since it uses as much as digits as its factorization.

646460053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 646460053 is about 25425.5787151443. The cubic root of 646460053 is about 864.6637083605.

The spelling of 646460053 in words is "six hundred forty-six million, four hundred sixty thousand, fifty-three".