278480539 has 2 divisors, whose sum is σ = 278480540. Its totient is φ = 278480538.

The previous prime is 278480479. The next prime is 278480551. The reversal of 278480539 is 935084872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278480539 - 2¹⁹ = 277956251 is a prime.

It is not a weakly prime, because it can be changed into another prime (278480639) 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, 139240269 + 139240270.

It is an arithmetic number, because the mean of its divisors is an integer number (139240270).

Almost surely, 2^278480539 is an apocalyptic number.

278480539 is a deficient number, since it is larger than the sum of its proper divisors (1).

278480539 is an equidigital number, since it uses as much as digits as its factorization.

278480539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 278480539 is about 16687.7361855945. The cubic root of 278480539 is about 653.0277202519.

The spelling of 278480539 in words is "two hundred seventy-eight million, four hundred eighty thousand, five hundred thirty-nine".