679965 has 32 divisors (see below), whose sum is σ = 1282176. Its totient is φ = 303360.

The previous prime is 679961. The next prime is 679969. The reversal of 679965 is 569976.

It is an interprime number because it is at equal distance from previous prime (679961) and next prime (679969).

It is not a de Polignac number, because 679965 - 2² = 679961 is a prime.

679965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1987 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (40068).

2⁶⁷⁹⁹⁶⁵ is an apocalyptic number.

679965 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

679965 is a deficient number, since it is larger than the sum of its proper divisors (602211).

679965 is a wasteful number, since it uses less digits than its factorization.

679965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its digits is 102060, while the sum is 42.

The square root of 679965 is about 824.5999029833. The cubic root of 679965 is about 87.9350847012.

The spelling of 679965 in words is "six hundred seventy-nine thousand, nine hundred sixty-five".