945863839 has 2 divisors, whose sum is σ = 945863840. Its totient is φ = 945863838.

The previous prime is 945863813. The next prime is 945863881. The reversal of 945863839 is 938368549.

It is a weak prime.

It is an emirp because it is prime and its reverse (938368549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945863839 - 2⁹ = 945863327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 945863839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945863239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472931919 + 472931920.

It is an arithmetic number, because the mean of its divisors is an integer number (472931920).

Almost surely, 2^945863839 is an apocalyptic number.

945863839 is a deficient number, since it is larger than the sum of its proper divisors (1).

945863839 is an equidigital number, since it uses as much as digits as its factorization.

945863839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The square root of 945863839 is about 30754.8994308224. The cubic root of 945863839 is about 981.6188151825.

The spelling of 945863839 in words is "nine hundred forty-five million, eight hundred sixty-three thousand, eight hundred thirty-nine".