979687 has 4 divisors (see below), whose sum is σ = 986976. Its totient is φ = 972400.

The previous prime is 979651. The next prime is 979691. The reversal of 979687 is 786979.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 979687 - 2¹⁵ = 946919 is a prime.

It is a Duffinian number.

979687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3439 + ... + 3712.

It is an arithmetic number, because the mean of its divisors is an integer number (246744).

2⁹⁷⁹⁶⁸⁷ is an apocalyptic number.

979687 is a deficient number, since it is larger than the sum of its proper divisors (7289).

979687 is a wasteful number, since it uses less digits than its factorization.

979687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288.

The product of its digits is 190512, while the sum is 46.

The square root of 979687 is about 989.7913921630. The cubic root of 979687 is about 99.3182629070.

The spelling of 979687 in words is "nine hundred seventy-nine thousand, six hundred eighty-seven".