705890189 has 8 divisors (see below), whose sum is σ = 730536960. Its totient is φ = 681263856.

The previous prime is 705890179. The next prime is 705890197. The reversal of 705890189 is 981098507.

It is a happy number.

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 705890189 - 2²⁴ = 689112973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705890179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107684 + ... + 114050.

It is an arithmetic number, because the mean of its divisors is an integer number (91317120).

Almost surely, 2^705890189 is an apocalyptic number.

It is an amenable number.

705890189 is a deficient number, since it is larger than the sum of its proper divisors (24646771).

705890189 is a wasteful number, since it uses less digits than its factorization.

705890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10219.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 705890189 is about 26568.5940350633. The cubic root of 705890189 is about 890.3874881325.

The spelling of 705890189 in words is "seven hundred five million, eight hundred ninety thousand, one hundred eighty-nine".