956646643 has 2 divisors, whose sum is σ = 956646644. Its totient is φ = 956646642.

The previous prime is 956646631. The next prime is 956646673. The reversal of 956646643 is 346646659.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 956646643 - 2²⁹ = 419775731 is a prime.

It is not a weakly prime, because it can be changed into another prime (956646673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478323321 + 478323322.

It is an arithmetic number, because the mean of its divisors is an integer number (478323322).

Almost surely, 2^956646643 is an apocalyptic number.

956646643 is a deficient number, since it is larger than the sum of its proper divisors (1).

956646643 is an equidigital number, since it uses as much as digits as its factorization.

956646643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 49.

The square root of 956646643 is about 30929.7048644180. The cubic root of 956646643 is about 985.3348661745.

The spelling of 956646643 in words is "nine hundred fifty-six million, six hundred forty-six thousand, six hundred forty-three".