15847879 has 2 divisors, whose sum is σ = 15847880. Its totient is φ = 15847878.

The previous prime is 15847849. The next prime is 15847907. The reversal of 15847879 is 97874851.

It is a strong prime.

It is an emirp because it is prime and its reverse (97874851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15847879 - 2⁵ = 15847847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15847829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7923939 + 7923940.

It is an arithmetic number, because the mean of its divisors is an integer number (7923940).

Almost surely, 2^15847879 is an apocalyptic number.

15847879 is a deficient number, since it is larger than the sum of its proper divisors (1).

15847879 is an equidigital number, since it uses as much as digits as its factorization.

15847879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The square root of 15847879 is about 3980.9394619863. The cubic root of 15847879 is about 251.1830804509.

The spelling of 15847879 in words is "fifteen million, eight hundred forty-seven thousand, eight hundred seventy-nine".