956505643 has 2 divisors, whose sum is σ = 956505644. Its totient is φ = 956505642.

The previous prime is 956505617. The next prime is 956505659. The reversal of 956505643 is 346505659.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 956505643 - 2²⁹ = 419634731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 956505643.

It is not a weakly prime, because it can be changed into another prime (956505673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478252821 + 478252822.

It is an arithmetic number, because the mean of its divisors is an integer number (478252822).

Almost surely, 2^956505643 is an apocalyptic number.

956505643 is a deficient number, since it is larger than the sum of its proper divisors (1).

956505643 is an equidigital number, since it uses as much as digits as its factorization.

956505643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 956505643 is about 30927.4254182271. The cubic root of 956505643 is about 985.2864543450.

The spelling of 956505643 in words is "nine hundred fifty-six million, five hundred five thousand, six hundred forty-three".