800979847 has 2 divisors, whose sum is σ = 800979848. Its totient is φ = 800979846.

The previous prime is 800979763. The next prime is 800979869. The reversal of 800979847 is 748979008.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800979847 - 2¹¹ = 800977799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 800979794 and 800979803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800974847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400489923 + 400489924.

It is an arithmetic number, because the mean of its divisors is an integer number (400489924).

Almost surely, 2^800979847 is an apocalyptic number.

800979847 is a deficient number, since it is larger than the sum of its proper divisors (1).

800979847 is an equidigital number, since it uses as much as digits as its factorization.

800979847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 800979847 is about 28301.5873583091. The cubic root of 800979847 is about 928.6966159998.

The spelling of 800979847 in words is "eight hundred million, nine hundred seventy-nine thousand, eight hundred forty-seven".