979971 has 4 divisors (see below), whose sum is σ = 1306632. Its totient is φ = 653312.

The previous prime is 979969. The next prime is 979987. The reversal of 979971 is 179979.

979971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 979971 - 2¹ = 979969 is a prime.

It is a D-number.

979971 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (979921) 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, 163326 + ... + 163331.

It is an arithmetic number, because the mean of its divisors is an integer number (326658).

2⁹⁷⁹⁹⁷¹ is an apocalyptic number.

979971 is a deficient number, since it is larger than the sum of its proper divisors (326661).

979971 is a wasteful number, since it uses less digits than its factorization.

979971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326660.

The product of its digits is 35721, while the sum is 42.

The square root of 979971 is about 989.9348463409. The cubic root of 979971 is about 99.3278590540.

It can be divided in two parts, 9799 and 71, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 979971 in words is "nine hundred seventy-nine thousand, nine hundred seventy-one".