646290311 has 2 divisors, whose sum is σ = 646290312. Its totient is φ = 646290310.

The previous prime is 646290299. The next prime is 646290313. The reversal of 646290311 is 113092646.

646290311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646290311 - 2⁶ = 646290247 is a prime.

Together with 646290313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646290313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323145155 + 323145156.

It is an arithmetic number, because the mean of its divisors is an integer number (323145156).

Almost surely, 2^646290311 is an apocalyptic number.

646290311 is a deficient number, since it is larger than the sum of its proper divisors (1).

646290311 is an equidigital number, since it uses as much as digits as its factorization.

646290311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 646290311 is about 25422.2404795486. The cubic root of 646290311 is about 864.5880230472.

The spelling of 646290311 in words is "six hundred forty-six million, two hundred ninety thousand, three hundred eleven".