646956283 has 2 divisors, whose sum is σ = 646956284. Its totient is φ = 646956282.

The previous prime is 646956281. The next prime is 646956293. The reversal of 646956283 is 382659646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646956283 - 2¹ = 646956281 is a prime.

It is a super-2 number, since 2×646956283² = 837104864226352178, which contains 22 as substring.

Together with 646956281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (646956281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323478141 + 323478142.

It is an arithmetic number, because the mean of its divisors is an integer number (323478142).

Almost surely, 2^646956283 is an apocalyptic number.

646956283 is a deficient number, since it is larger than the sum of its proper divisors (1).

646956283 is an equidigital number, since it uses as much as digits as its factorization.

646956283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 49.

The square root of 646956283 is about 25435.3353231287. The cubic root of 646956283 is about 864.8848936346.

The spelling of 646956283 in words is "six hundred forty-six million, nine hundred fifty-six thousand, two hundred eighty-three".