705603989 has 8 divisors (see below), whose sum is σ = 771211008. Its totient is φ = 642674880.

The previous prime is 705603971. The next prime is 705604013. The reversal of 705603989 is 989306507.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 705603989 - 2¹² = 705599893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705603289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668927 + ... + 669980.

It is an arithmetic number, because the mean of its divisors is an integer number (96401376).

Almost surely, 2^705603989 is an apocalyptic number.

It is an amenable number.

705603989 is a deficient number, since it is larger than the sum of its proper divisors (65607019).

705603989 is a wasteful number, since it uses less digits than its factorization.

705603989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338955.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 705603989 is about 26563.2074305796. The cubic root of 705603989 is about 890.2671373326.

The spelling of 705603989 in words is "seven hundred five million, six hundred three thousand, nine hundred eighty-nine".