705385989 has 48 divisors (see below), whose sum is σ = 1317388800. Its totient is φ = 366424560.

The previous prime is 705385987. The next prime is 705386029. The reversal of 705385989 is 989583507.

It is not a de Polignac number, because 705385989 - 2¹ = 705385987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705385987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139 + ... + 37560.

It is an arithmetic number, because the mean of its divisors is an integer number (27445600).

Almost surely, 2^705385989 is an apocalyptic number.

It is an amenable number.

705385989 is a deficient number, since it is larger than the sum of its proper divisors (612002811).

705385989 is a wasteful number, since it uses less digits than its factorization.

705385989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37732 (or 37720 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 705385989 is about 26559.1036934607. The cubic root of 705385989 is about 890.1754436774.

The spelling of 705385989 in words is "seven hundred five million, three hundred eighty-five thousand, nine hundred eighty-nine".