646232263 has 2 divisors, whose sum is σ = 646232264. Its totient is φ = 646232262.

The previous prime is 646232227. The next prime is 646232297. The reversal of 646232263 is 362232646.

It is an a-pointer prime, because the next prime (646232297) can be obtained adding 646232263 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646232263 - 2¹⁷ = 646101191 is a prime.

It is a super-2 number, since 2×646232263² = 835232275484202338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646232663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323116131 + 323116132.

It is an arithmetic number, because the mean of its divisors is an integer number (323116132).

Almost surely, 2^646232263 is an apocalyptic number.

646232263 is a deficient number, since it is larger than the sum of its proper divisors (1).

646232263 is an equidigital number, since it uses as much as digits as its factorization.

646232263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 34.

The square root of 646232263 is about 25421.0987764101. The cubic root of 646232263 is about 864.5621373076.

The spelling of 646232263 in words is "six hundred forty-six million, two hundred thirty-two thousand, two hundred sixty-three".