719985 has 16 divisors (see below), whose sum is σ = 1316736. Its totient is φ = 329088.

The previous prime is 719981. The next prime is 719989. The reversal of 719985 is 589917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (719981) and next prime (719989).

It is not a de Polignac number, because 719985 - 2² = 719981 is a prime.

719985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (719981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3324 + ... + 3533.

It is an arithmetic number, because the mean of its divisors is an integer number (82296).

2⁷¹⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

719985 is a deficient number, since it is larger than the sum of its proper divisors (596751).

719985 is a wasteful number, since it uses less digits than its factorization.

719985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872.

The product of its digits is 22680, while the sum is 39.

The square root of 719985 is about 848.5192985431. The cubic root of 719985 is about 89.6274725095.

The spelling of 719985 in words is "seven hundred nineteen thousand, nine hundred eighty-five".