7447879 has 2 divisors, whose sum is σ = 7447880. Its totient is φ = 7447878.

The previous prime is 7447877. The next prime is 7447889. The reversal of 7447879 is 9787447.

It is a weak prime.

It is an emirp because it is prime and its reverse (9787447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7447879 - 2¹ = 7447877 is a prime.

Together with 7447877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7447877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3723939 + 3723940.

It is an arithmetic number, because the mean of its divisors is an integer number (3723940).

Almost surely, 2^7447879 is an apocalyptic number.

7447879 is a deficient number, since it is larger than the sum of its proper divisors (1).

7447879 is an equidigital number, since it uses as much as digits as its factorization.

7447879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 7447879 is about 2729.0802479957. The cubic root of 7447879 is about 195.2888902320.

The spelling of 7447879 in words is "seven million, four hundred forty-seven thousand, eight hundred seventy-nine".