679881 has 8 divisors (see below), whose sum is σ = 959904. Its totient is φ = 426560.

The previous prime is 679879. The next prime is 679883. The reversal of 679881 is 188976.

It is an interprime number because it is at equal distance from previous prime (679879) and next prime (679883).

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 679881 - 2¹ = 679879 is a prime.

It is a super-2 number, since 2×679881² = 924476348322, which contains 22 as substring.

679881 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (679883) 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, 6615 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (119988).

2⁶⁷⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

679881 is a deficient number, since it is larger than the sum of its proper divisors (280023).

679881 is a wasteful number, since it uses less digits than its factorization.

679881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13351.

The product of its digits is 24192, while the sum is 39.

The square root of 679881 is about 824.5489676181. The cubic root of 679881 is about 87.9314635093.

The spelling of 679881 in words is "six hundred seventy-nine thousand, eight hundred eighty-one".