979691 has 2 divisors, whose sum is σ = 979692. Its totient is φ = 979690.

The previous prime is 979651. The next prime is 979709. The reversal of 979691 is 196979.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979691 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 979691.

It is not a weakly prime, because it can be changed into another prime (979651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489845 + 489846.

It is an arithmetic number, because the mean of its divisors is an integer number (489846).

2⁹⁷⁹⁶⁹¹ is an apocalyptic number.

979691 is a deficient number, since it is larger than the sum of its proper divisors (1).

979691 is an equidigital number, since it uses as much as digits as its factorization.

979691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 979691 is about 989.7934127887. The cubic root of 979691 is about 99.3183980768.

The spelling of 979691 in words is "nine hundred seventy-nine thousand, six hundred ninety-one".