2178479 has 2 divisors, whose sum is σ = 2178480. Its totient is φ = 2178478.

The previous prime is 2178467. The next prime is 2178511. The reversal of 2178479 is 9748712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2178479 - 2⁸ = 2178223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089239 + 1089240.

It is an arithmetic number, because the mean of its divisors is an integer number (1089240).

2^2178479 is an apocalyptic number.

2178479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178479 is an equidigital number, since it uses as much as digits as its factorization.

2178479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 2178479 is about 1475.9671405556. The cubic root of 2178479 is about 129.6336629201.

The spelling of 2178479 in words is "two million, one hundred seventy-eight thousand, four hundred seventy-nine".