646403327 has 2 divisors, whose sum is σ = 646403328. Its totient is φ = 646403326.

The previous prime is 646403323. The next prime is 646403377. The reversal of 646403327 is 723304646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646403327 - 2² = 646403323 is a prime.

It is a super-2 number, since 2×646403327² = 835674522313337858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646403321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323201663 + 323201664.

It is an arithmetic number, because the mean of its divisors is an integer number (323201664).

Almost surely, 2^646403327 is an apocalyptic number.

646403327 is a deficient number, since it is larger than the sum of its proper divisors (1).

646403327 is an equidigital number, since it uses as much as digits as its factorization.

646403327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 646403327 is about 25424.4631605074. The cubic root of 646403327 is about 864.6384165950.

The spelling of 646403327 in words is "six hundred forty-six million, four hundred three thousand, three hundred twenty-seven".