7812879859 has 2 divisors, whose sum is σ = 7812879860. Its totient is φ = 7812879858.

The previous prime is 7812879803. The next prime is 7812879869. The reversal of 7812879859 is 9589782187.

It is a strong prime.

It is an emirp because it is prime and its reverse (9589782187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7812879859 - 2¹¹ = 7812877811 is a prime.

It is a super-2 number, since 2×7812879859² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7812879859.

It is not a weakly prime, because it can be changed into another prime (7812879869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3906439929 + 3906439930.

It is an arithmetic number, because the mean of its divisors is an integer number (3906439930).

Almost surely, 2^7812879859 is an apocalyptic number.

7812879859 is a deficient number, since it is larger than the sum of its proper divisors (1).

7812879859 is an equidigital number, since it uses as much as digits as its factorization.

7812879859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 64.

The square root of 7812879859 is about 88390.4964291976. The cubic root of 7812879859 is about 1984.2834738298.

The spelling of 7812879859 in words is "seven billion, eight hundred twelve million, eight hundred seventy-nine thousand, eight hundred fifty-nine".