646299323 has 2 divisors, whose sum is σ = 646299324. Its totient is φ = 646299322.

The previous prime is 646299289. The next prime is 646299349. The reversal of 646299323 is 323992646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646299323 - 2¹⁴ = 646282939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (646299223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323149661 + 323149662.

It is an arithmetic number, because the mean of its divisors is an integer number (323149662).

Almost surely, 2^646299323 is an apocalyptic number.

646299323 is a deficient number, since it is larger than the sum of its proper divisors (1).

646299323 is an equidigital number, since it uses as much as digits as its factorization.

646299323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 44.

The square root of 646299323 is about 25422.4177253069. The cubic root of 646299323 is about 864.5920416907.

The spelling of 646299323 in words is "six hundred forty-six million, two hundred ninety-nine thousand, three hundred twenty-three".