979807 has 2 divisors, whose sum is σ = 979808. Its totient is φ = 979806.

The previous prime is 979787. The next prime is 979819. The reversal of 979807 is 708979.

It is a strong prime.

It is an emirp because it is prime and its reverse (708979) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979807 is a prime.

979807 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 979807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489903 + 489904.

It is an arithmetic number, because the mean of its divisors is an integer number (489904).

2⁹⁷⁹⁸⁰⁷ is an apocalyptic number.

979807 is a deficient number, since it is larger than the sum of its proper divisors (1).

979807 is an equidigital number, since it uses as much as digits as its factorization.

979807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 979807 is about 989.8520091408. The cubic root of 979807 is about 99.3223178432.

The spelling of 979807 in words is "nine hundred seventy-nine thousand, eight hundred seven".